Accessibility navigation


Monsoon‐induced zonal asymmetries in moisture transport cause anomalous Pacific precipitation minus evaporation

Craig, P. M. ORCID: https://orcid.org/0000-0001-9213-4599, Ferreira, D. and Methven, J. (2020) Monsoon‐induced zonal asymmetries in moisture transport cause anomalous Pacific precipitation minus evaporation. Geophysical Research Letters, 47 (18). e2020GL088. ISSN 0094-8276

[img]
Preview
Text (Open Access) - Published Version
· Available under License Creative Commons Attribution.
· Please see our End User Agreement before downloading.

1MB
[img] Text - Accepted Version
· Restricted to Repository staff only

2MB

It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing.

To link to this item DOI: 10.1029/2020GL088659

Abstract/Summary

Basin‐integrated precipitation minus evaporation (P‐E) in the Pacific is near neutral while the Atlantic shows net evaporation. We link this P-E asymmetry to atmospheric moisture fluxes across the boundaries of the ocean drainage basins. Adopting an objective approach based on a comparison between actual fluxes and a zonally averaged circulation, we show that the asymmetry is dominated by moisture fluxes associated with the monthly‐mean flow at low latitudes rather than by differences in moisture fluxes into the Southern Ocean and Arctic catchments. In boreal summer, the eastward moisture flux, due to the Asian Summer Monsoon flow opposes the zonal mean westward flux in the Trade Winds and results in more positive P‐E over the Pacific than both the Atlantic and Indian Oceans, even in the annual mean. Our analysis reveals that moisture flux across Southeast Asia, rather than across Central America, is the dominant factor in the P‐E asymmetry.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > NCAS
Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:92865
Publisher:American Geophysical Union

Downloads

Downloads per month over past year

University Staff: Request a correction | Centaur Editors: Update this record

Page navigation