Sökning: id:"swepub:oai:DiVA.org:kth-333898" >
Warm air intrusions...
Warm air intrusions reaching the MOSAiC expedition in April 2020- The YOPP targeted observing period (TOP)
-
- Svensson, Gunilla (författare)
- Stockholms universitet,KTH,SeRC - Swedish e-Science Research Centre,Department of Meteorology and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Engineering Mechanics, KTH Royal Institute of Technology, Stockholm, Sweden,Meteorologiska institutionen (MISU),Bolincentret för klimatforskning (tills m KTH & SMHI)
-
- Murto, Sonja, 1992- (författare)
- Stockholms universitet,Meteorologiska institutionen (MISU),Bolincentret för klimatforskning (tills m KTH & SMHI),Department of Meteorology and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden
-
- Shupe, Matthew D. (författare)
- Cooperative Institute for Research in Environmental Sciences, University of Colorado and Physical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USA
-
visa fler...
-
- Pithan, Felix (författare)
- Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), Bremerhaven/Potsdam, Germany, Bremerhaven
-
- Magnusson, Linus (författare)
- European Centre for Medium-Range Weather Forecasts, Reading, UK
-
- Day, Jonathan J. (författare)
- European Centre for Medium-Range Weather Forecasts, Reading, UK
-
- Doyle, James D. (författare)
- U.S. Naval Research Laboratory, Marine Meteorology Division, Monterey, CA, USA
-
- Renfrew, Ian A. (författare)
- School of Environmental Sciences, University of East Anglia, Norwich, UK
-
- Spengler, Thomas (författare)
- Geophysical Institute, University of Bergen and Bjerknes Centre for Climate Research, Bergen, Norway
-
- Vihma, Timo (författare)
- Meteorological Research, Finnish Meteorological Institute, Helsinki, Finland
-
visa färre...
-
(creator_code:org_t)
- University of California Press, 2023
- 2023
- Engelska.
-
Ingår i: Elementa. - : University of California Press. - 2325-1026. ; 11:1
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- In the spring period of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition, an initiative was in place to increase the radiosounding frequency during warm air intrusions in the Atlantic Arctic sector. Two episodes with increased surface temperatures were captured during April 12–22, 2020, during a targeted observing period (TOP).The large-scale circulation efficiently guided the pulses of warm air into the Arctic and the observed surface temperature increased from -30◦C to near melting conditions marking the transition to spring, as the temperatures did not return to values below -20◦C. Back-trajectory analysis identifies 3 pathways for the transport. For the first temperature maximum, the circulation guided the airmass over the Atlantic to the northern Norwegian coast and then to the MOSAiC site.The second pathway was from the south, and it passed over the Greenland ice sheet and arrived at the observational site as a warm but dry airmass due to precipitation on the windward side.The third pathway was along the Greenland coast and the arriving airmass was both warm and moist. The back trajectories originating from pressure levels between 700 and 900 hPa line up vertically, which is somewhat surprising in this dynamically active environment. The processes acting along the trajectory originating from 800 hPa at the MOSAIC site are analyzed. Vertical profiles and surface energy exchange are presented to depict the airmass transformation based on ERA5 reanalysis fields. The TOP could be used for model evaluation and Lagrangian model studies to improve the representation of the small-scale physical processes that are important for airmass transformation. A comparison between MOSAiC observations and ERA5 reanalysis demonstrates challenges in the representation of small-scale processes, such as turbulence and the contributions to various terms of the surface energy budget, that are often misrepresented in numerical weather prediction and climate models.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Arctic climate
- Lagrangian airmass transformation
- MOSAiC
- Reanalysis evaluation
- Warm air intrusions
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
-
Elementa
(Sök värdpublikationen i LIBRIS)
Till lärosätets databas
- Av författaren/redakt...
-
Svensson, Gunill ...
-
Murto, Sonja, 19 ...
-
Shupe, Matthew D ...
-
Pithan, Felix
-
Magnusson, Linus
-
Day, Jonathan J.
-
visa fler...
-
Doyle, James D.
-
Renfrew, Ian A.
-
Spengler, Thomas
-
Vihma, Timo
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Geovetenskap och ...
-
och Meteorologi och ...
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Geovetenskap och ...
- Artiklar i publikationen
-
Elementa
- Av lärosätet
-
Kungliga Tekniska Högskolan
-
Stockholms universitet