Surface warming from altitudinal and latitudinal amplification over Antarctica since the International Geophysical Year

Abstract Warming has been and is being enhanced at high latitudes or high elevations, whereas the quantitative estimation for warming from altitude and latitude effects has not been systematically investigated over Antarctic Ice Sheet, which covers more than 27 degrees of latitude and 4000 m altitud...

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Bibliographic Details
Published in:Scientific Reports
Main Authors: Aihong Xie, Jiangping Zhu, Xiang Qin, Shimeng Wang, Bing Xu, Yicheng Wang
Format: Article in Journal/Newspaper
Language:English
Published: Nature Portfolio 2023
Subjects:
Medicine
R
Science
Q
Antarctic
Antarc*
Antarctica
Ice Sheet
Online Access:https://doi.org/10.1038/s41598-023-35521-w
https://doaj.org/article/6f45e952bbc44546b74b4a4802664d0c
Description
Summary:Abstract Warming has been and is being enhanced at high latitudes or high elevations, whereas the quantitative estimation for warming from altitude and latitude effects has not been systematically investigated over Antarctic Ice Sheet, which covers more than 27 degrees of latitude and 4000 m altitude ranges. Based on the monthly surface air temperature data (1958–2020) from ERA5 reanalysis, this work aims to explore whether elevation-dependent warming (EDW) and latitude-dependent warming (LDW) exist. Results show that both EDW and LDW have the cooperative effect on Antarctic warming, and the magnitude of EDW is stronger than LDW. The negative EDW appears between 250 m and 2500 m except winter, and is strongest in autumn. The negative LDW occurs between 83 °S and 90 °S except in summer. Moreover, the surface downward long-wave radiation that related to the specific humidity, total cloud cover and cloud base height is a major contributor to the EDW over Antarctica. Further research on EDW and LDW should be anticipated to explore the future Antarctic amplification under different emission scenarios.

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