Document Type

Article

Publication Date

9-3-2018

Publication Title

Journal of Geophysical Research: Atmospheres

Volume

123

Issue

17

Pages

9011-9025

Abstract

To better understand the potential effects of climate change on atmospheric dynamics, this paper studies Rossby wave breaking and isentropic stratosphere‐troposphere exchange (STE) in the Northern Hemisphere between 320 and 380 K during 1981–2015 using the Modern‐Era Retrospective Analysis for Research and Application version 2 data. The isentropic STE is estimated using Contour Advection. Our results show that anticyclonic wave breaking events have become more frequent, especially in summer at higher isentropic surfaces, and cyclonic wave breaking events have become less frequent at 320 K. The anticyclonic wave breaking has shifted poleward in summer. The isentropic STE is found to be strongest over the regions where Rossby wave breaking activities are most frequent. Both isentropic STE and Rossby wave breaking are shown to be strongest in summer and weakest in winter. Our results do not show any discernable trends during isentropic STE during 1981–2015.

Comments

Author Posting. © American Geophysical Union 2018. This article is posted here by permission of the American Geophysical Union for personal use, not for redistribution. The article was published in the Journal of Geophysical Research: Atmospheres, 2018, https://doi.org/10.1029/2018JD028997

Creative Commons License

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

Available for download on Sunday, March 03, 2019

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