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Li, L., S. Li, 2022: A Comparison of two 20th century reanalysis datasets from the perspective of cross-equatorial flows. J. Meteor. Soc. Japan, 100, 807-824.
https://doi.org/10.2151/jmsj.2022-042
Graphical Abstract

Plain Language Summary: This study compared two sets of 20th century reanalyses, ERA20C and 20CRv3, from the perspective of boreal summer low-level cross-equatorial flows (CEFs) over the Asian-Australian monsoon region. The results show a substantial gap between them in CEFs’ interdecadal variability, and ERA20C is more reliable than 20CRv3, in spite of their overall consistence in climatological mean, interannual variability and long-term trend.

Highlights:

• Cross-equatorial sea-level pressure gradient and Indian summer monsoonal rainfall are verified as two benchmarks for inspecting CEFs’ reliability.
• 20CRv3 and ERA20C have an overall consistence in CEFs’ climatological spatial structure, interannual variability and long-term trend, but a substantial gap in interdecadal variability.
• ERA20C is validated to be more suitable for investigating decadal variability associated with CEFs.