| Records |
| Author |
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| Title |
Ground-based validation of the Copernicus Sentinel-5P TROPOMI NO2 measurements with the NDACC ZSL-DOAS, MAX-DOAS and Pandonia global networks |
Type |
Journal |
| Year |
2021 |
Publication |
Atmospheric Measurement Techniques |
Abbreviated Journal |
|
| Volume |
14 |
Issue |
1 |
Pages |
481-510 |
| Keywords |
|
Abstract  |
This Paper Reports On Consolidated Ground-based Validation Results Of The Atmospheric No2 Data Produced Operationally Since April 2018 By The Tropospheric Monitoring Instrument (Tropomi) On Board Of The Esa/eu Copernicus Sentinel-5 Precursor (S5p) Satellite. Tropospheric, Stratospheric, And Total No2 Column Data From S5p Are Compared To Correlative Measurements Collected From, Respectively, 19 Multi-axis Differential Optical Absorption Spectroscopy (Max-doas), 26 Network For The Detection Of Atmospheric Composition Change (Ndacc) Zenith-scattered-light Doas (Zsl-doas), And 25 Pandonia Global Network (Pgn)/pandora Instruments Distributed Globally. The Validation Methodology Gives Special Care To Minimizing Mismatch Errors Due To Imperfect Spatio-temporal Co-location Of The Satellite And Correlative Data, E.g. By Using Tailored Observation Operators To Account For Differences In Smoothing And In Sampling Of Atmospheric Structures And Variability And Photochemical Modelling To Reduce Diurnal Cycle Effects. Compared To The Ground-based Measurements, S5p Data Show, On Average, (I) A Negative Bias For The Tropospheric Column Data, Of Typically ?23 % To ?37 % In Clean To Slightly Polluted Conditions But Reaching Values As High As ?51 % Over Highly Polluted Areas; (Ii) A Slight Negative Median Difference For The Stratospheric Column Data, Of About ?0.2 Pmolec Cm?2, I.e. Approx. ?2 % In Summer To ?15 % In Winter; And (Iii) A Bias Ranging From Zero To ?50 % For The Total Column Data, Found To Depend On The Amplitude Of The Total No2 Column, With Small To Slightly Positive Bias Values For Columns Below 6 Pmolec Cm?2 And Negative Values Above. The Dispersion Between S5p And Correlative Measurements Contains Mostly Random Components, Which Remain Within Mission Requirements For The Stratospheric Column Data (0.5 Pmolec Cm?2) But Exceed Those For The Tropospheric Column Data (0.7 Pmolec Cm?2). While A Part Of The Biases And Dispersion May Be Due To Representativeness Differences Such As Different Area Averaging And Measurement Times, It Is Known That Errors In The S5p Tropospheric Columns Exist Due To Shortcomings In The (Horizontally Coarse) A Priori Profile Representation In The Tm5-mp Chemical Transport Model Used In The S5p Retrieval And, To A Lesser Extent, To The Treatment Of Cloud Effects And Aerosols. Although Considerable Differences (Up To 2 Pmolec Cm?2 And More) Are Observed At Single Ground-pixel Level, The Near-real-time (Nrti) And Offline (Offl) Versions Of The S5p No2 Operational Data Processor Provide Similar No2 Column Values And Validation Results When Globally Averaged, With The Nrti Values Being On Average 0.79 % Larger Than The Offl Values. |
| Programme |
209 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1867-1381 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
8013 |
| Permanent link to this record |
| |
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| |
| Author |
|
| Title |
Ground-based validation of the Copernicus Sentinel-5p TROPOMI NO2 measurements with the NDACC ZSL-DOAS, MAX-DOAS and Pandonia global networks |
Type |
Journal |
| Year |
2020 |
Publication |
Atmospheric Measurement Techniques Discussions |
Abbreviated Journal |
|
| Volume |
|
Issue |
|
Pages |
1-40 |
| Keywords |
|
| Abstract |
This Paper Reports On Consolidated Ground-based Validation Results Of The Atmospheric No2 Data Produced Operationally Since April 2018 By The Tropomi Instrument On Board Of The Esa/eu Copernicus Sentinel-5 Precursor (S5p) Satellite. Tropospheric, Stratospheric, And Total No2 Column Data From S5p Are Compared To Correlative Measurements Collected From, Respectively, 19 Multi-axis Doas (Max-doas), 26 Ndacc Zenith-scattered-light Doas (Zsl-doas), And 25 Pgn/pandora Instruments Distributed Globally. The Validation Methodology Gives Special Care To Minimizing Mismatch Errors Due To Imperfect Spatio-temporal Co-location Of The Satellite And Correlative Data, E.g., By Using Tailored Observation Operators To Account For Differences In Smoothing And In Sampling Of Atmospheric Structures And Variability, And Photochemical Modelling To Reduce Diurnal Cycle Effects. Compared To The Ground-based Measurements, S5p Data Show, On An Average: (I) A Negative Bias For The Tropospheric Column Data, Of Typically ?23 To ?37?% In Clean To Slightly Polluted Conditions, But Reaching Values As High As ?51?% Over Highly Polluted Areas; (Ii) A Slight Negative Bias For The Stratospheric Column Data, Of About ?0.2?Pmolec/cm2, I.e. Approx. ?2?% In Summer To ?15?% In Winter; And (Iii) A Bias Ranging From Zero To ?50?% For The Total Column Data, Found To Depend On The Amplitude Of The Total No2 Column, With Small To Slightly Positive Bias Values For Columns Below 6?Pmolec/cm2 And Negative Values Above. The Dispersion Between S5p And Correlative Measurements Contains Mostly Random Components, Which Remain Within Mission Requirements For The Stratospheric Column Data (0.5?Pmolec/cm2), But Exceed Those For The Tropospheric Column Data (0.7?Pmolec/cm2). While A Part Of The Biases And Dispersion May Be Due To Representativeness Differences, It Is Known That Errors In The S5p Tropospheric Columns Exist Due To Shortcomings In The (Horizontally Coarse) A-priori Profile Representation In The Tm5-mp Chemistry Transport Model Used In The S5p Retrieval, And To A Lesser Extent, To The Treatment Of Cloud Effects. Although Considerable Differences (Up To 2?Pmolec/cm2 And More) Are Observed At Single Ground-pixel Level, The Near-real-time (Nrti) And Off-line (Offl) Versions Of The S5p No2 Operational Data Processor Provide Similar No2 Column Values And Validation Results When Globally Averaged, With The Nrti Values Being On Average 0.79?% Larger Than The Offl Values. |
| Programme |
209 |
| Campaign |
|
| Address |
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| Corporate Author |
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Thesis |
Bachelor's thesis |
| Publisher |
|
Place of Publication |
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Editor |
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| Language |
|
Summary Language |
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Original Title |
|
| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
|
Edition |
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| ISSN |
1867-1381 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
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Conference |
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| Notes |
|
Approved |
yes |
| Call Number |
|
Serial |
7782 |
| Permanent link to this record |
| |
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| |
| Author |
|
| Title |
Shoreline changes in a rising sea level context: The example of Grande Glorieuse, Scattered Islands, Western Indian Ocean |
Type |
Journal |
| Year |
2015 |
Publication |
Acta Oecologica |
Abbreviated Journal |
|
| Volume |
72 |
Issue |
|
Pages |
110-119 |
| Keywords |
Climate change French overseas territories Indian Ocean Observatory Reef islands Scattered Islands Sea level rise Shoreline changes Vertical land movement |
| Abstract |
This paper provides baseline data on absolute and relative sea level variations and shoreline changes in the Scattered Islands region of the Indian Ocean, based on aerial image analysis, satellite altimetry and field observations and in situ measurements from the 2009 and 2011 TAAF scientific expeditions. The analysis shows the importance of regular observations and monitoring of these islands to better understand reef island responses to climate stressors. We show that Grande Glorieuse Island has increased in area by 7.5 ha between 1989 and 2003, predominantly as a result of shoreline accretion: accretion occurred over 47% of shoreline length, whereas 26% was stable and 28% was eroded. Topographic transects and field observations show that the accretion is due to sediment transfer from the reef outer slopes to the reef flat and then to the beach. This accretion occurred in a context of sea level rise: sea level has risen by about 6 cm in the last twenty years and the island height is probably stable or very slowly subsiding. This island expansion during a period of rising sea level demonstrates that sea level rise is not the primary factor controlling the shoreline changes. This paper highlights the key role of non-climate factors in changes in island area, especially sediment availability and transport. We also evidence rotation of the island, underscoring the highly dynamic nature of reef islands. |
| Programme |
688 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
|
Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
|
Edition |
|
| ISSN |
1146-609X |
ISBN |
1146-609X |
Medium |
|
| Area |
|
Expedition |
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Conference |
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| Notes |
|
Approved |
yes |
| Call Number |
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Serial |
7067 |
| Permanent link to this record |
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| |
| Author |
Guinet C, Tixier P, Gasco N, Duhamel G, |
| Title |
Long-term studies of Crozet Island killer whales are fundamental to understanding the economic and demographic consequences of their depredation behaviour on the Patagonian toothfish fishery
|
Type |
Journal Article |
| Year |
2014 |
Publication |
ICES Journal of Marine Science |
Abbreviated Journal |
|
| Volume |
72 |
Issue |
5 |
Pages |
1587-1597 |
| Keywords |
|
| Abstract |
This paper provides a synthesis of results obtained as part of a long-term collaborative study involving biologists, fishers, and resource managers--centring on the occurrence of killer whales in the Crozet Archipelago before and after the implementation of a demersal longline fishery for Patagonian toothfish. Depredation behaviour was reported as soon as the fishery was initiated, with dramatic effects on both the demographic trajectories of the killer whales and on the amount of fish lost by the fishers. Killer whales interacting with the fishery exhibited very high mortality rates when illegal fishing took place, while killer whales not interacting were unaffected. However, after illegal fishing ended, killer whales interacting with the fishery exhibited both higher fecundity and survival rates compared with killer whales not interacting. Since whales typically removed fish entirely from the hooks, an adapted methodology that did not rely on determining the number of damaged fish was developed to estimate depredation rates. In the Crozet EEZ over a 10-year period, 33.9% of the total amount of Patagonian toothfish caught, representing a total of 28 million {euro}, was estimated to be lost due to the combined effects of killer whale and sperm whale depredation. In an effort to reduce depredation losses, modifications to fishing methods, such as changing the fishing season, changing fishing areas when exposed to depredation and changing longline length and hauling speed were successfully tested. Acoustic deterrent devices were ineffective in deterring killer whales from depredating longlines. Alternative fishing gears, such as fish pots, were also tested. However, while providing encouraging results regarding the suppression of depredation and seabird bycatch, fish pots were not efficient enough to sustain an economically viable fishery. In conclusion, we discuss how the findings of this comprehensive study can be used elsewhere in fisheries confronted with depredation.
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| Programme |
109 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
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ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
|
Serial |
5918 |
| Permanent link to this record |
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| |
| Author |
David Boertmann, Flemming Merkel, Olivier Gilg |
| Title |
Seabird Breeding Colonies in East and North Greenland: A Baseline |
Type |
Journal |
| Year |
2020 |
Publication |
ARCTIC |
Abbreviated Journal |
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| Volume |
73 |
Issue |
1 |
Pages |
20-39 |
| Keywords |
climate change colonial seabirds distribution Greenland |
| Abstract |
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| Programme |
1036 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
1923-1245 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
7681 |
| Permanent link to this record |
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| Author |
Margaux Gourdal, Odile Crabeck, Martine Lizotte, Virginie Galindo, Michel Gosselin, Marcel Babin, Michael Scarratt, Maurice Levasseur |
| Title |
Upward transport of bottom-ice dimethyl sulfide during advanced melting of arctic first-year sea ice |
Type |
Journal |
| Year |
2019 |
Publication |
Elementa: Science of the Anthropocene |
Abbreviated Journal |
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| Volume |
7 |
Issue |
33 |
Pages |
|
| Keywords |
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| Abstract |
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| Programme |
1164 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
2325-1026 |
ISBN |
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Medium |
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| Area |
|
Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
|
Serial |
8126 |
| Permanent link to this record |
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| Author |
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| Title |
Stratospheric aerosol data records for the climate change initiative: Development, validation and application to chemistry-climate modelling |
Type |
Journal |
| Year |
2017 |
Publication |
Remote Sensing of Environment |
Abbreviated Journal |
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| Volume |
203 |
Issue |
|
Pages |
296-321 |
| Keywords |
Aerosol burden Aerosol remote sensing Climate data record Climate modelling ENVISAT GOMOS Lidar Stratospheric aerosol extinction Volcanic eruptions |
| Abstract |
|
| Programme |
209 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0034-4257 |
ISBN |
0034-4257 |
Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6753 |
| Permanent link to this record |
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| Author |
Rinaldi Matteo, Decesari Stefano, Carbone Claudio, Finessi Emanuela, Fuzzi Sandro, Ceburnis Darius, O'Dowd Colin D, Sciare Jean, Burrows John P, Vrekoussis Mihalis, Ervens Barbara, Tsigaridis Kostas, Facchini Maria Cristina, |
| Title |
Evidence of a natural marine source of oxalic acid and a possible link to glyoxal
|
Type |
Journal Article |
| Year |
2011 |
Publication |
J. Geophys. Res. |
Abbreviated Journal |
J. Geophys. Res. |
| Volume |
116 |
Issue |
D16 |
Pages |
D16204- |
| Keywords |
SOA, cloud processes, glyoxal, marine aerosol, oxalic acid, 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801, 4906), 0320 Atmospheric Composition and Structure: Cloud physics and chemistry, 0322 Atmospheric Composition and Structure: Constituent sources and sinks, 3311 Atmospheric Processes: Clouds and aerosols, |
| Abstract |
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| Programme |
415 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
AGU |
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0148-0227 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
3251 |
| Permanent link to this record |
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| Author |
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| Title |
Terrestrial and submarine evidence for the extent and timing of the Last Glacial Maximum and the onset of deglaciation on the maritime-Antarctic and sub-Antarctic islands
|
Type |
Journal Article |
| Year |
2014 |
Publication |
Quaternary Science Reviews |
Abbreviated Journal |
Quat Sci Rev |
| Volume |
100 |
Issue |
|
Pages |
137-158 |
| Keywords |
Antarctic ice sheet, Sub-Antarctica, Maritime Antarctica glaciation, Deglaciation, Quaternary, Climate, |
| Abstract |
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| Programme |
1048 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0277-3791 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
|
Serial |
5342 |
| Permanent link to this record |
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| Author |
Keddar, I., Altmeyer, S., Couchoux, C., Jouventin, P. & Dobson, F. S. |
| Title |
Mate Choice and Colored Beak Spots of King Penguins. |
Type |
Journal Article |
| Year |
2015 |
Publication |
Ethology |
Abbreviated Journal |
|
| Volume |
121 |
Issue |
|
Pages |
1048-1058 |
| Keywords |
|
| Abstract |
This paper is issued from one chapter of Ismael Keddar PhD thesis. I Keddar was supervised by F Bonadonna as main supervisor and S F Dobson as co-supervisor, and stopped the research career after defending his thesis in 2014. In 2015, SF Dobson fraudulently published this chapter deleting my name from the authorship (as it was in the thesis manuscript) and without informing me. The direction of my lab (the CEFE-CNRS), the IPEV, and the CNRS itself were informed, and sustained me. A legal case has been opened by CNRS. |
| Programme |
354 |
| Campaign |
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| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
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Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0179-1613 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
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Serial |
6299 |
| Permanent link to this record |
