Cutoff Lows over the Southeast Pacific off the Coast of the Atacama Desert under Present Day Conditions and in the Last Glacial Maximum

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Title:Main Title: Cutoff Lows over the Southeast Pacific off the Coast of the Atacama Desert under Present Day Conditions and in the Last Glacial Maximum
Description:Abstract: The large-scale climate over the Southeast Pacific off the coast of the Atacama Desert in South America is characterised by low synoptic variability. A rather rare but nonetheless prominent synoptic feature of this region are mid-tropospheric cutoff lows which form off the coast of northern Chile. These cutoff lows may influence the local climate in the Atacama Desert. For example, the March 2015 Atacama flood is associated to such a cutoff low together with a positive sea surface temperature anomaly over the eastern tropical Pacific, and we found evidence that the cutoff lows also impact local wind regimes at different sites of the Atacama Desert. In this study we aim to investigate the dynamical processes which favour the development of the cutoff lows over the Southeast Pacific. Case studies and composite analyses are performed using ERA-Interim reanalysis to highlight the role of upper-topospheric jets and Rossby Wave Breaking in the development of the cutoff lows. Further, the occurrence of the cutoff lows and the associated dynamical processes during the Last Glacial Maximum are analysed, as distinctly more cutoff lows are detected for the Last Glacial Maximum than under present day conditions in two PMIP3 models.
Responsible Party
Creator:Mark Reyers (Author)
Publisher:CRC1211 Database (CRC1211DB)
Publication Year:2019
Topic
CRC1211 Topic:Climate
Related Subproject:A3
Subject:Keyword: Climate Models
Geogr. Information Topic:Climatology/Meteorology/Atmosphere
File Details
Filename:Poster_Reyers_EGU2018.pdf
Data Type:Text - Text
File Size:3.2 MB
Date:Created: 02.04.2018
Mime Type:application/pdf
Language:English
Status:Completed
Constraints
Download Permission:Free
General Access and Use Conditions:According to the CRC1211DB data policy agreement.
Access Limitations:According to the CRC1211DB data policy agreement.
Licence:None
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Specific Information - Presentation
Presenter:Mark Reyers
Presentation Date:12th of April, 2018
Presentation Type:Poster
Event:EGU2018
Event Type:Conference
Event Location:Vienna
Event Duration:7th of April, 2018 - 12th of April, 2018
Metadata Details
Metadata Creator:Mark Reyers
Metadata Created:23.05.2019
Metadata Last Updated:23.05.2019
Subproject:A3
Funding Phase:1
Metadata Language:English
Metadata Version:V50
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