Periodic decadal swings in dry/wet conditions over Central Asia
Periodic variability in the hydro-climatic system has important implications not only for climate prediction but also for planning and managing water resources. Here we identify periodic decadal variability of dry/wet conditions in Central Asia (CA) since the mid-20th century, which are tied to the...
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Online Access: | https://doi.org/10.1088/1748-9326/ac6c3b https://doaj.org/article/5eaabf9b6be74a298a67efa8c915dfe7 |
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ftdoajarticles:oai:doaj.org/article:5eaabf9b6be74a298a67efa8c915dfe7 2023-09-05T13:21:37+02:00 Periodic decadal swings in dry/wet conditions over Central Asia Yusen Liu Cheng Sun Zengchao Hao Bian He 2022-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ac6c3b https://doaj.org/article/5eaabf9b6be74a298a67efa8c915dfe7 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ac6c3b https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac6c3b 1748-9326 https://doaj.org/article/5eaabf9b6be74a298a67efa8c915dfe7 Environmental Research Letters, Vol 17, Iss 5, p 054050 (2022) decadal oscillation Pacific quasi-decadal oscillation Central Asian dry/wet conditions periodic climate variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2022 ftdoajarticles https://doi.org/10.1088/1748-9326/ac6c3b 2023-08-13T00:36:40Z Periodic variability in the hydro-climatic system has important implications not only for climate prediction but also for planning and managing water resources. Here we identify periodic decadal variability of dry/wet conditions in Central Asia (CA) since the mid-20th century, which are tied to the Pacific quasi-decadal oscillation (PQDO) with a period of 8–16 years ( r = 0.87). The periodically varying forcing in the Pacific modulates zonal winds and moisture transport and profoundly affects the precipitation on the decadal time scale. The PQDO-related equatorial central Pacific warming significantly heats the overlying troposphere, increasing the meridional temperature/geopotential gradients in the subtropics. As a result, the strengthened westerly jet in CA transports more water vapor from the North Atlantic and increases local precipitation. The plateau to the east further amplifies the increased precipitation in eastern CA through orographic influence on the convection and large-scale circulation. The atmospheric model forced by the PQDO signal reproduces an overall consistent mechanism with the observation, indicating a robust synchronization of the Central Asian hydro-climatic system to the PQDO. The newly discovered oscillatory feature in this study may advance the predictability of Central Asian precipitation on the decadal time scale, which promotes the mitigation and prevention of natural disasters like droughts and wildfires. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Pacific Environmental Research Letters 17 5 054050 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
decadal oscillation Pacific quasi-decadal oscillation Central Asian dry/wet conditions periodic climate variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
decadal oscillation Pacific quasi-decadal oscillation Central Asian dry/wet conditions periodic climate variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Yusen Liu Cheng Sun Zengchao Hao Bian He Periodic decadal swings in dry/wet conditions over Central Asia |
topic_facet |
decadal oscillation Pacific quasi-decadal oscillation Central Asian dry/wet conditions periodic climate variability Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Periodic variability in the hydro-climatic system has important implications not only for climate prediction but also for planning and managing water resources. Here we identify periodic decadal variability of dry/wet conditions in Central Asia (CA) since the mid-20th century, which are tied to the Pacific quasi-decadal oscillation (PQDO) with a period of 8–16 years ( r = 0.87). The periodically varying forcing in the Pacific modulates zonal winds and moisture transport and profoundly affects the precipitation on the decadal time scale. The PQDO-related equatorial central Pacific warming significantly heats the overlying troposphere, increasing the meridional temperature/geopotential gradients in the subtropics. As a result, the strengthened westerly jet in CA transports more water vapor from the North Atlantic and increases local precipitation. The plateau to the east further amplifies the increased precipitation in eastern CA through orographic influence on the convection and large-scale circulation. The atmospheric model forced by the PQDO signal reproduces an overall consistent mechanism with the observation, indicating a robust synchronization of the Central Asian hydro-climatic system to the PQDO. The newly discovered oscillatory feature in this study may advance the predictability of Central Asian precipitation on the decadal time scale, which promotes the mitigation and prevention of natural disasters like droughts and wildfires. |
format |
Article in Journal/Newspaper |
author |
Yusen Liu Cheng Sun Zengchao Hao Bian He |
author_facet |
Yusen Liu Cheng Sun Zengchao Hao Bian He |
author_sort |
Yusen Liu |
title |
Periodic decadal swings in dry/wet conditions over Central Asia |
title_short |
Periodic decadal swings in dry/wet conditions over Central Asia |
title_full |
Periodic decadal swings in dry/wet conditions over Central Asia |
title_fullStr |
Periodic decadal swings in dry/wet conditions over Central Asia |
title_full_unstemmed |
Periodic decadal swings in dry/wet conditions over Central Asia |
title_sort |
periodic decadal swings in dry/wet conditions over central asia |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
https://doi.org/10.1088/1748-9326/ac6c3b https://doaj.org/article/5eaabf9b6be74a298a67efa8c915dfe7 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Environmental Research Letters, Vol 17, Iss 5, p 054050 (2022) |
op_relation |
https://doi.org/10.1088/1748-9326/ac6c3b https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac6c3b 1748-9326 https://doaj.org/article/5eaabf9b6be74a298a67efa8c915dfe7 |
op_doi |
https://doi.org/10.1088/1748-9326/ac6c3b |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
5 |
container_start_page |
054050 |
_version_ |
1776202217820258304 |