Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep30456
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Funding
- National Natural Science Foundation of China [41475063, 41375100]
- U.S. NSF [AGS-1419526]
- China National 973 Project [2015CB453200]
- Natural Science Foundation of Jiangsu Province, China [BK20140046]
- Jiangsu Collaborative Innovation Center for Climate Change
- Directorate For Geosciences [1419526] Funding Source: National Science Foundation
- Div Atmospheric & Geospace Sciences [1419526] Funding Source: National Science Foundation
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The Tibetan Plateau (TP), known as the third pole of the Earth, has snow cover with intraseasonal to decadal variability that affects weather and climate both inside and outside the TP. However, the factors that generate the TP snow cover (TPSC) anomalies at the intraseasonal time-scale are unclear. This report reveals the influence of the Madden. Julian oscillation (MJO), which is the most dominant component of the tropical intraseasonal variability, on TPSC. We focus on wintertime snow cover over the central and eastern TP, where the intraseasonal variability is large. TPSC increases/ decreases in the MJO phases 8-1/4-5, when the eastward-propagating MJO suppressed/ enhanced convection locates over the Maritime Continent. Such a change in TPSC leads to the most dominant positive/ negative anomalies of TPSC in the following phases 2-3/6-7 due to the non-significant change of TPSC in these phases. There is anomalous moisture advection over the upstream of the TP caused by MJO-excited large-scale atmospheric circulation. The advection process generates the low-frequency eastward-propagating anomalous water vapour from upstream to the TP that influences precipitation and, eventually, TPSC.
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