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Title | Nitrogen isotopes (?15N) and oxygen isotope anomalies (?17O, ?18O) in atmospheric nitrogen dioxide : a new perspective for isotopic constraints on oxidation and aerosols formation processes | Type | Communication | ||
Year | 2021 | Publication | EGU General Assembly 2021, 10-30 april 2021, Vienna, Austria | Abbreviated Journal | |
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Programme | 1215 | ||||
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Series Volume | Series Issue | Edition | |||
ISSN | EGU21-2634 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Serial | 8511 | |||
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Author | Dedieu, J.-P., A. Wendleder, B. Cerino, J. Boike, E. Bernard, J.-C. Gallet, and H.-W. Jacobi | ||||
Title | Snow change detection from polarimetric SAR time-series at X-band (Svalbard, Norway), EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-149. | Type | Peer-reviewed symposium | ||
Year | 2021 | Publication | Egusphere | Abbreviated Journal | |
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Abstract | Due to recent climate change conditions, i.e. increasing temperatures and changing precipitation patterns, arctic snow cover dynamics exhibit strong changes in terms of extent and duration. Arctic amplification processes and impacts are well documented expected to strengthen in coming decades. In this context, innovative observation methods are helpful for a better comprehension of the spatial variability of snow properties relevant for climate research and hydrological applications. Microwave remote sensing provides exceptional spatial and temporal performance in terms of all-weather application and target penetration. Time-series of Synthetic Active Radar images (SAR) are becoming more accessible at different frequencies and polarimetry has demonstrated a significant advantage for detecting changes in different media. Concerning arctic snow monitoring, SAR sensors can offer continuous time-series during the polar night and with cloud cover, providing a consequent advantage in regard of optical sensors. The aim of this study is dedicated to the spatial/temporal variability of snow in the Ny-Ålesund area on the Br∅gger peninsula, Svalbard (N 78°55’ / E 11° 55’). The TerraSAR-X satellite (DLR, Germany) operated at X-band (3.1 cm, 9.6 GHz) with dual co-pol mode (HH/VV) at 5-m spatial resolution, and with high incidence angles (36° to 39°) poviding a better snow penetration and reducing topographic constraints. A dataset of 92 images (ascending and descending) is available since 2017, together with a high resolution DEM (NPI 5-m) and consistent in-situ measurements of meteorological data and snow profiles including glaciers sites. Polarimetric processing is based on the Kennaugh matrix decomposition, copolar phase coherence (CCOH) and copolar phase difference (CPD). The Kennaugh matrix elements K0, K3, K4, and K7 are, respectively, the total intensity, phase ratio, intensity ratio, and shift between HH and VV phase center. Their interpretation allows analysing the structure of the snowpack linked to the near real time of in-situ measurements (snow profiles). The X-band signal is strongly influenced by the snow stratigraphy: internal ice layers reduce or block the penetration of the signal into the snow pack. The best R2 correlation performances between estimated and measured snow heights are ranging from 0.50 to 0.70 for dry snow conditions. Therefore, the use of the X-band for regular snow height estimations remains limited under these conditions. Conversely, this study shows the benefit of TerraSAR-X thanks to the Kennaugh matrix elements analysis. A focus is set on the Copolar Phase Difference (CPD, Leinss 2016) between VV and HH polarization: Φ CPD = Φ VV – Φ HH. Our results indicate that the CPD values are related to the snow metamorphism: positive values correspond to dry snow (horizontal structures), negative values indicate recrystallization processes (vertical structures). Backscattering evolution in time offer a good proxy for meteorological events detection, impacting on snow metamorphism. Fresh snowfalls or melting processes can then be retrieved at the regional scale and linked to air temperature or precipitation measurements at local scale. Polarimetric SAR time series is therefore of interest to complement satellite-based precipitation measurements in the Arctic. |
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Programme | 1126 | ||||
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ISSN | EGU21-149 | ISBN | Medium | ||
Area | Expedition | Conference | |||
Notes | Approved | yes | |||
Call Number | Serial | 7247 | |||
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Author | Mccoy, Kd | ||||
Title | Tick and tick-borne disease circulation in a changing marine ecosystem | Type | Book | ||
Year | 2021 | Publication | In “Climate, Ticks and Disease” ed. Pat Nuttall, University of Oxford, UK, CABI Climate Change Series | Abbreviated Journal | |
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Abstract | This Book Brings Together Expert Opinions From Scientists To Consider The Evidence For Climate Change And Its Impacts On Ticks And Tick-borne Infections, And Provide Predictions For The Future. It Considers What Is Meant By 'Climate Change', How Good Are Climate Models Relevant To Ecosystems, And Predictions For Changes In Climate At Global, Regional, And Local Scales Relevant For Ticks And Tick-borne Infections. It Examines Changes To Tick Distribution And The Evidence That Climate Change Is Responsible. The Effect Of Climate On The Physiology And Metabolism Of Ticks, Including Potentially Critical Impacts On The Tick Microbiome Is Stressed. Given That The Notoriety Of Ticks Derives From Pathogens They Transmit, Do Changes In Climate Affect Vector Capacity? Ticks Transmit A Remarkable Range Of Micro- And Macro-parasites Many Of Which Are Pathogens Of Humans And Domesticated Animals. The Intimacy Between Tick-borne Agent And Tick Vector Means That Any Impacts Of Climate On A Tick Vector Will Impact Tick-borne Pathogens. Most Obviously, Such Impacts Will Be Apparent As Changes In Disease Incidence And Prevalence. The Evidence That Climate Change Is Affecting Diseases Caused By Tick-borne Pathogens Is Considered, Along With The Potential To Make Robust Predictions Of Future Events. | ||||
Programme | 333 | ||||
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ISSN | 9781789249637 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8036 | |||
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Title | Type | Book | |||
Year | 2021 | Publication | Abbreviated Journal | ||
Volume | Issue | Pages | 232 pages | ||
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Programme | 388 | ||||
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ISSN | 978-2-330-15652-7 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8448 | |||
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Author | Karen D. McCoy | ||||
Title | Community-Level Interactions and Disease Dynamics | Type | Book | ||
Year | 2021 | Publication | Infectious Disease Ecology of Wild Birds | Abbreviated Journal | |
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Programme | 333 | ||||
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ISSN | 978-0-19-874624-9 | ISBN | 978-0-19-874624-9 | Medium | |
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Notes | Approved | yes | |||
Call Number | Serial | 8498 | |||
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Title | Type | Journal | |||
Year | 2021 | Publication | Communications Earth & Environment | Abbreviated Journal | |
Volume | 2 | Issue | 1 | Pages | 1-8 |
Keywords | Physical oceanography | ||||
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Programme | 688 | ||||
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Series Volume | Series Issue | Edition | |||
ISSN | 2662-4435 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8387 | |||
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Title | Effects of Climate and Atmospheric Nitrogen Deposition on Early to Mid-Term Stage Litter Decomposition Across Biomes | Type | Journal | ||
Year | 2021 | Publication | Frontiers in Forests and Global Change | Abbreviated Journal | |
Volume | 4 | Issue | Pages | ||
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Programme | 136 | ||||
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Series Volume | Series Issue | Edition | |||
ISSN | 2624-893X | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8301 | |||
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Title | Sexual segregation in a sexually dimorphic seabird: a matter of spatial scale | Type | Journal | ||
Year | 2021 | Publication | Peer Community in Ecology | Abbreviated Journal | |
Volume | 1 | Issue | Pages | 100025 | |
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Abstract | A recommendation of: Christophe Barbraud, Karine Delord, Akiko Kato, Paco Bustamante, Yves Cherel Sexual segregation in a highly pagophilic and sexually dimorphic marine predator https://doi.org/10.1101/472431 | ||||
Programme | 109 | ||||
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ISSN | 2606-4979 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8434 | |||
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Title | Similar circling movements observed across marine megafauna taxa | Type | Journal | ||
Year | 2021 | Publication | iScience | Abbreviated Journal | |
Volume | 24 | Issue | 4 | Pages | 102221 |
Keywords | Animals Biological Sciences Ecology Ethology Zoology | ||||
Abstract | Advances in biologging technology have enabled 3D dead-reckoning reconstruction of marine animal movements at spatiotemporal scales of meters and seconds. Examining high-resolution 3D movements of sharks (Galeocerdo cuvier, N = 4; Rhincodon typus, N = 1), sea turtles (Chelonia mydas, N = 3), penguins (Aptenodytes patagonicus, N = 6), and marine mammals (Arctocephalus gazella, N = 4; Ziphius cavirostris, N = 1), we report the discovery of circling events where animals consecutively circled more than twice at relatively constant angular speeds. Similar circling behaviors were observed across a wide variety of marine megafauna, suggesting these behaviors might serve several similar purposes across taxa including foraging, social interactions, and navigation. | ||||
Programme | 394 | ||||
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Series Volume | Series Issue | Edition | |||
ISSN | 2589-0042 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8095 | |||
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Title | An estimation of the quantitative impacts of copepod grazing on an under sea-ice spring phytoplankton bloom in western Baffin Bay, Canadian Arctic | Type | Journal | ||
Year | 2021 | Publication | Elementa: Science of the Anthropocene | Abbreviated Journal | |
Volume | 9 | Issue | 1 | Pages | 00092 |
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Programme | 1164 | ||||
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ISSN | 2325-1026 | ISBN | Medium | ||
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Notes | Approved | yes | |||
Call Number | Serial | 8255 | |||
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