Show simple item record

contributor authorGoss, Michael
contributor authorLee, Sukyoung
contributor authorFeldstein, Steven B.
contributor authorDiffenbaugh, Noah S.
date accessioned2019-09-19T10:10:24Z
date available2019-09-19T10:10:24Z
date copyright7/31/2018 12:00:00 AM
date issued2018
identifier otherjcli-d-17-0771.1.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4262354
description abstractAbstractA daily El Niño?Southern Oscillation (ENSO) index is developed based on precipitation rate and is used to investigate subseasonal time-scale extratropical circulation anomalies associated with ENSO-like convective heating. The index, referred to as the El Niño precipitation index (ENPI), is anomalously positive when there is El Niño?like convection. Conversely, the ENPI is anomalously negative when there is La Niña?like convection. It is found that when precipitation becomes El Niño?like (La Niña?like) on subseasonal time scales, the 300-hPa geopotential height field over the North Pacific and western North America becomes El Niño?like (La Niña?like) within 5?10 days. The composites show a small association with the MJO. These results are supported by previous modeling studies, which show that the response over the North Pacific and western North America to an equatorial Pacific heating anomaly occurs within about one week. This suggests that the mean seasonal extratropical response to El Niño (La Niña) may in effect simply be the average of the subseasonal response to subseasonally varying El Niño?like (La Niña?like) convective heating. Implications for subseasonal to seasonal forecasting are discussed.
publisherAmerican Meteorological Society
titleCan ENSO-Like Convection Force an ENSO-Like Extratropical Response on Subseasonal Time Scales?
typeJournal Paper
journal volume31
journal issue20
journal titleJournal of Climate
identifier doi10.1175/JCLI-D-17-0771.1
journal fristpage8339
journal lastpage8349
treeJournal of Climate:;2018:;volume 031:;issue 020
contenttypeFulltext


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record