caa a22 4500 605472912 CHVBK 20210128100340.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00382-015-2490-8 doi (NATIONALLICENCE)springer-10.1007/s00382-015-2490-8 Teleconnected influence of tropical Northwest Pacific sea surface temperature on interannual variability of autumn precipitation in Southwest China [Elektronische Daten] [Lin Wang, Wen Chen, Wen Zhou, Gang Huang] The interannual variation of autumn precipitation in Southwest China (SWC) and the possible influence of tropical Northwest Pacific (NWP) sea surface temperature (SST) are investigated. Statistical analysis shows that SWC precipitation is negatively correlated with concurrent NWP SST. The warm NWP SST that promotes dry conditions in SWC is linked to three dynamical processes: (1) Warm NWP SST excites an anomalous cyclone over the South China Sea, which is oriented against the climatological flow, weakening the transportation of moisture from the NWP. (2) Warm NWP SST strengthens the westerlies along the equatorial Indian Ocean. As a result, most of the moisture is transported over the maritime continent and thus the poleward flow carrying moisture from the Indian Ocean into SWC becomes weaker. (3) Warm NWP SST provokes anomalous ascent and upper-level divergence in situ, with one path of the outflow heading northwestward and converging over SWC, which induces compensating subsidence over the SWC region. The results of numerical experiments, forced by SST anomalies in the NWP alone, are found to reproduce the observed atmospheric response, indicating that the impact of NWP SST on SWC precipitation is physical and that the moisture conditions over SWC are triggered primarily by the fluctuation of NWP SST. Due to the persistent SST anomaly over NWP from summer to autumn, the NWP SST in the preceding summer can be considered a predictor for autumn drought in SWC. Furthermore, autumn precipitation in SWC has experienced a significant decrease since 1994, probably maintained by the long-lasting warm NWP SST in recent decades. Springer-Verlag Berlin Heidelberg, 2015 Drought nationallicence Precipitation nationallicence Southwest China nationallicence Northwest Pacific nationallicence SST nationallicence Wang Lin Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing, China aut Chen Wen Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100190, Beijing, China aut Zhou Wen Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China aut Huang Gang State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing, China aut Climate Dynamics Springer Berlin Heidelberg 45/9-10(2015-11-01), 2527-2539 0930-7575 45:9-10<2527 2015 45 382 https://doi.org/10.1007/s00382-015-2490-8 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-015-2490-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Lin Key Laboratory of Regional Climate-Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing, China aut NATIONALLICENCE 700 1- Chen Wen Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100190, Beijing, China aut NATIONALLICENCE 700 1- Zhou Wen Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Hong Kong, China aut NATIONALLICENCE 700 1- Huang Gang State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Beijing, China aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 45/9-10(2015-11-01), 2527-2539 0930-7575 45:9-10<2527 2015 45 382