Search Results - "BRACHER, ASTRID"

Sea-ice derived meltwater stratification slows the biological carbon pump: results from continuous observations by von Appen, Wilken-Jon, Waite, Anya M., Bergmann, Melanie, Bienhold, Christina, Boebel, Olaf, Bracher, Astrid, Cisewski, Boris, Hagemann, Jonas, Hoppema, Mario, Iversen, Morten H., Konrad, Christian, Krumpen, Thomas, Lochthofen, Normen, Metfies, Katja, Niehoff, Barbara, Nöthig, Eva-Maria, Purser, Autun, Salter, Ian, Schaber, Matthias, Scholz, Daniel, Soltwedel, Thomas, Torres-Valdes, Sinhue, Wekerle, Claudia, Wenzhöfer, Frank, Wietz, Matthias, Boetius, Antje

“…The ocean moderates the world’s climate through absorption of heat and carbon, but how much carbon the ocean will continue to absorb remains unknown. The North…”
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High colored dissolved organic matter (CDOM) absorption in surface waters of the central-eastern Arctic Ocean: Implications for biogeochemistry and ocean color algorithms by Gonçalves-Araujo, Rafael, Rabe, Benjamin, Peeken, Ilka, Bracher, Astrid

“…As consequences of global warming sea-ice shrinking, permafrost thawing and changes in fresh water and terrestrial material export have already been reported…”
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Glucose as a Potential Chemical Marker for Ice Nucleating Activity in Arctic Seawater and Melt Pond Samples by Zeppenfeld, Sebastian, van Pinxteren, Manuela, Hartmann, Markus, Bracher, Astrid, Stratmann, Frank, Herrmann, Hartmut

“…Recent studies pointed to a high ice nucleating activity (INA) in the Arctic sea surface microlayer (SML). However, related chemical information is still…”
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Global retrieval of phytoplankton functional types based on empirical orthogonal functions using CMEMS GlobColour merged products and further extension to OLCI data by Xi, Hongyan, Losa, Svetlana N., Mangin, Antoine, Soppa, Mariana A., Garnesson, Philippe, Demaria, Julien, Liu, Yangyang, d'Andon, Odile Hembise Fanton, Bracher, Astrid

“…This study presents an algorithm for globally retrieving chlorophyll a (Chl-a) concentrations of phytoplankton functional types (PFTs) from multi-sensor merged…”
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On the drivers of phytoplankton blooms in the Antarctic marginal ice zone: A modeling approach by Taylor, Marc H., Losch, Martin, Bracher, Astrid

“…The pelagic province of the Southern Ocean generally has low levels of primary production attributable to a short growing season in the higher latitudes, a…”
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Assessment of Polymer Atmospheric Correction Algorithm for Hyperspectral Remote Sensing Imagery over Coastal Waters by Soppa, Mariana A., Silva, Brenner, Steinmetz, François, Keith, Darryl, Scheffler, Daniel, Bohn, Niklas, Bracher, Astrid

“…Spaceborne imaging spectroscopy, also called hyperspectral remote sensing, has shown huge potential to improve current water colour retrievals and, thereby,…”
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Using fluorescent dissolved organic matter to trace and distinguish the origin of Arctic surface waters by Gonçalves-Araujo, Rafael, Granskog, Mats A., Bracher, Astrid, Azetsu-Scott, Kumiko, Dodd, Paul A., Stedmon, Colin A.

“…Climate change affects the Arctic with regards to permafrost thaw, sea-ice melt, alterations to the freshwater budget and increased export of terrestrial…”
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Variations of the Organic Matter Composition in the Sea Surface Microlayer: A Comparison between Open Ocean, Coastal, and Upwelling Sites Off the Peruvian Coast by Zäncker, Birthe, Bracher, Astrid, Röttgers, Rüdiger, Engel, Anja

“…The sea surface microlayer (SML) is the thin boundary layer between the ocean and the atmosphere, making it important for air-sea exchange processes. However,…”
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Investigation of Spectral Band Requirements for Improving Retrievals of Phytoplankton Functional Types by Wolanin, Aleksandra, Soppa, Mariana, Bracher, Astrid

“…Studying phytoplankton functional types (PFTs) from space is possible due to recent advances in remote sensing. Though a variety of products are available, the…”
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Unprecedented insights into extents of biological responses to physical forcing in an Arctic sub-mesoscale filament by combining high-resolution measurement approaches by Weiß, Josefine Friederike, von Appen, Wilken-Jon, Niehoff, Barbara, Hildebrand, Nicole, Graeve, Martin, Neuhaus, Stefan, Bracher, Astrid, Nöthig, Eva-Maria, Metfies, Katja

“…In Fram Strait, we combined underway-sampling using the remote-controlled Automated Filtration System for Marine Microbes (AUTOFIM) with CTD-sampling for eDNA…”
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Diatom Phenology in the Southern Ocean: Mean Patterns, Trends and the Role of Climate Oscillations by Soppa, Mariana, Völker, Christoph, Bracher, Astrid

“…Diatoms are the major marine primary producers in the Southern Ocean and a key component of the carbon and silicate biogeochemical cycle. Using 15 years of…”
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Inter-comparison of phytoplankton functional type phenology metrics derived from ocean color algorithms and Earth System Models by Kostadinov, Tihomir S., Cabré, Anna, Vedantham, Harish, Marinov, Irina, Bracher, Astrid, Brewin, Robert J.W., Bricaud, Annick, Hirata, Takafumi, Hirawake, Toru, Hardman-Mountford, Nick J., Mouw, Colleen, Roy, Shovonlal, Uitz, Julia

“…Ocean color remote sensing of chlorophyll concentration has revolutionized our understanding of the biology of the oceans. However, a comprehensive…”
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Natural variability or anthropogenically-induced variation? Insights from 15 years of multidisciplinary observations at the arctic marine LTER site HAUSGARTEN by Soltwedel, Thomas, Bauerfeind, Eduard, Bergmann, Melanie, Bracher, Astrid, Budaeva, Nataliya, Busch, Kathrin, Cherkasheva, Alexandra, Fahl, Kirsten, Grzelak, Katarzyna, Hasemann, Christiane, Jacob, Marianne, Kraft, Angelina, Lalande, Catherine, Metfies, Katja, Nöthig, Eva-Maria, Meyer, Kirstin, Quéric, Nadia-Valérie, Schewe, Ingo, Włodarska-Kowalczuk, Maria, Klages, Michael

“…Time-series studies of arctic marine ecosystems are rare. This is not surprising since polar regions are largely only accessible by means of expensive modern…”
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Horizontal niche partitioning of humpback and fin whales around the West Antarctic Peninsula: evidence from a concurrent whale and krill survey by Herr, Helena, Viquerat, Sacha, Siegel, Volker, Kock, Karl-Hermann, Dorschel, Boris, Huneke, Wilma G. C., Bracher, Astrid, Schröder, Michael, Gutt, Julian

“…A dedicated aerial cetacean survey was conducted concurrently to a standardised net trawl survey for krill in order to investigate distribution patterns of…”
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Marine isoprene production and consumption in the mixed layer of the surface ocean – a field study over two oceanic regions by Booge, Dennis, Schlundt, Cathleen, Bracher, Astrid, Endres, Sonja, Zäncker, Birthe, Marandino, Christa A

“…Parameterizations of surface ocean isoprene concentrations are numerous, despite the lack of source/sink process understanding. Here we present isoprene and…”
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Oxygenated volatile organic carbon in the western Pacific convective center: ocean cycling, air–sea gas exchange and atmospheric transport by Schlundt, Cathleen, Tegtmeier, Susann, Lennartz, Sinikka T, Bracher, Astrid, Cheah, Wee, Krüger, Kirstin, Quack, Birgit, Marandino, Christa A

“…A suite of oxygenated volatile organic compounds (OVOCs – acetaldehyde, acetone, propanal, butanal and butanone) were measured concurrently in the surface…”
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Field Intercomparison of Radiometer Measurements for Ocean Colour Validation by Tilstone, Gavin, Dall’Olmo, Giorgio, Hieronymi, Martin, Ruddick, Kevin, Beck, Matthew, Ligi, Martin, Costa, Maycira, D’Alimonte, Davide, Vellucci, Vincenzo, Vansteenwegen, Dieter, Bracher, Astrid, Wiegmann, Sonja, Kuusk, Joel, Vabson, Viktor, Ansko, Ilmar, Vendt, Riho, Donlon, Craig, Casal, Tânia

“…A field intercomparison was conducted at the Acqua Alta Oceanographic Tower (AAOT) in the northern Adriatic Sea, from 9 to 19 July 2018 to assess differences…”
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TROPOMI-Retrieved Underwater Light Attenuation in Three Spectral Regions in the Ultraviolet and Blue by Oelker, Julia, Losa, Svetlana N., Richter, Andreas, Bracher, Astrid

“…Ultraviolet (UV) radiation plays an important role in the ocean for the biogeochemical cycling through photooxidation of colored dissolved organic matter and…”
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Direct oceanic emissions unlikely to account for the missing source of atmospheric carbonyl sulfide by Lennartz, Sinikka T, Marandino, Christa A, von Hobe, Marc, Cortes, Pau, Quack, Birgit, Simo, Rafel, Booge, Dennis, Pozzer, Andrea, Steinhoff, Tobias, Arevalo-Martinez, Damian L, Kloss, Corinna, Bracher, Astrid, Röttgers, Rüdiger, Atlas, Elliot, Krüger, Kirstin

“…The climate active trace-gas carbonyl sulfide (OCS) is the most abundant sulfur gas in the atmosphere. A missing source in its atmospheric budget is currently…”
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Can simple models predict large-scale surface ocean isoprene concentrations? by Booge, Dennis, Marandino, Christa A, Schlundt, Cathleen, Palmer, Paul I, Schlundt, Michael, Atlas, Elliot L, Bracher, Astrid, Saltzman, Eric S, Wallace, Douglas W. R

“…We use isoprene and related field measurements from three different ocean data sets together with remotely sensed satellite data to model global marine…”
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