2021 CSDMS meeting-044: Difference between revisions

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|CSDMS meeting abstract title=Variations of Regional Erosion Rates Since LGM Mapped Through Time and Space
|CSDMS meeting abstract title=Variations of Regional Erosion Rates Since LGM Mapped Through Time and Space
|Working_group_member_WG_FRG=Terrestrial Working Group
|Working_group_member_WG_FRG=Terrestrial Working Group
}}
{{CSDMS meeting authors template
|CSDMS meeting coauthor first name abstract=Risa
|CSDMS meeting coauthor last name abstract=Madoff
|CSDMS meeting coauthor institute / Organization=University of North Dakota
|CSDMS meeting coauthor town-city=Grand Forks
|CSDMS meeting coauthor country=United States
|State=North Dakota
|CSDMS meeting coauthor email address=risa.madoff@und.edu
}}
}}
{{CSDMS meeting authors template
{{CSDMS meeting authors template

Revision as of 16:15, 23 April 2021


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Variations of Regional Erosion Rates Since LGM Mapped Through Time and Space

Risa Madoff, University of North Dakota Grand Forks North Dakota, United States. risa.madoff@und.edu
Jaakko Putkonen, University of North Dakota Grand Forks North Dakota, United States. jaakko.putkonen@und.edu



Our understanding of temporal changes in long term regional erosion rates in hundreds of years resolution is currently limited. The existing published research is either restricted in spatial coverage, the time frame is in millions of years, or the erosion rate through time is considered constant. We strive to fill this gap by mapping the regional erosion at a resolution of 3.7° latitude by 3.75° long (approximately 412 km x 416 km at the equator) at 500-year resolution for the past 21 ka for all land areas. We employ a transfer function that relates mean annual air temperature (MAAT) with erosion that is derived from published field observations recorded during recent times and transferred through past 21 ka by using space-for-time substitution with paleo-temperature data from TraCE-21ka, a global climate model. Averaging erosion rates and MAAT by latitudes of the Kӧppen climate zones, a non-linear relationship was established. Among the many findings, the largest variation in erosion rates through time is found in cold regions, such as higher elevations and the Arctic. Furthermore, tropical or sub-tropical regions show minimal variation in erosion through time.