TY - JOUR
T1 - Impacts of the Silk Road pattern on the interdecadal variations of the atmospheric heat source over the Tibetan Plateau
AU - Han, Yizhe
AU - Ma, Weiqiang
AU - Yang, Yaoxian
AU - Ma, Yaoming
AU - Xie, Zhipeng
AU - Sun, Genhou
AU - Menenti, Massimo
AU - Su, Bob
PY - 2021
Y1 - 2021
N2 - This study aimed to investigate the relationship between the boreal summer Silk Road Pattern (SRP) and the atmospheric heat (<Q1>) over the Tibetan Plateau (TP) region, using 5 reanalysis datasets over the period 1979–2019. Our results indicate an interdecadal change of boreal summer SRP over the Eurasian region, with a regime shift in the spatial structure at around 1997. Meanwhile, the summer <Q1> anomaly also shows a clear interdecadal increasing trend over the TP region, which is highly correlated with the interdecadal variation of the SRP. The impact of the SRP on the summer <Q1> was also investigated. The regime shift of the SRP would have generated circulation anomalies over the Lake Baikal region in 500 hPa, which would have inhibited moisture transport across the eastern boundary of the TP. Meanwhile, Indian Summer Monsoon (ISM) would also transport water vapor through the southern boundary of the TP and increased the contents of water vapor in the TP. Associated with this increase in moisture, the change of vertical motion would result in large plenty of precipitation, which released latent heat and enhanced <Q1> in summer. Thus, the regime shift in summer SRP was an important factor contributing to changes in summer <Q1> over the TP in recent decades.
AB - This study aimed to investigate the relationship between the boreal summer Silk Road Pattern (SRP) and the atmospheric heat (<Q1>) over the Tibetan Plateau (TP) region, using 5 reanalysis datasets over the period 1979–2019. Our results indicate an interdecadal change of boreal summer SRP over the Eurasian region, with a regime shift in the spatial structure at around 1997. Meanwhile, the summer <Q1> anomaly also shows a clear interdecadal increasing trend over the TP region, which is highly correlated with the interdecadal variation of the SRP. The impact of the SRP on the summer <Q1> was also investigated. The regime shift of the SRP would have generated circulation anomalies over the Lake Baikal region in 500 hPa, which would have inhibited moisture transport across the eastern boundary of the TP. Meanwhile, Indian Summer Monsoon (ISM) would also transport water vapor through the southern boundary of the TP and increased the contents of water vapor in the TP. Associated with this increase in moisture, the change of vertical motion would result in large plenty of precipitation, which released latent heat and enhanced <Q1> in summer. Thus, the regime shift in summer SRP was an important factor contributing to changes in summer <Q1> over the TP in recent decades.
KW - Atmospheric heat source
KW - Interdecadal variability
KW - Reanalysis datasets
KW - Silk Road Pattern (SRP)
KW - Tibetan Plateau
UR - http://www.scopus.com/inward/record.url?scp=85108096741&partnerID=8YFLogxK
U2 - 10.1016/j.atmosres.2021.105696
DO - 10.1016/j.atmosres.2021.105696
M3 - Article
AN - SCOPUS:85108096741
SN - 0169-8095
VL - 260
SP - 1
EP - 14
JO - Atmospheric Research
JF - Atmospheric Research
M1 - 105696
ER -