caa a22 4500 445301236 CHVBK 20180317142558.0 cr unu---uuuuu 170323e20101101xx s 000 0 eng 10.1007/s11430-010-4024-x doi (NATIONALLICENCE)springer-10.1007/s11430-010-4024-x An East Asian land-sea atmospheric heat source difference index and its relation to general circulation and summer rainfall over China [Elektronische Daten] [Bo Zhang, XiuJi Zhou, LongXun Chen, YanFeng Zhu, Bin Zhao] Using a monthly precipitation dataset of 160 stations over China and a daily and monthly National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis dataset from 1961 to 2006, we here define an East Asian land-sea atmospheric heat source difference index I LSQD and investigate its relationship to summer rainfall in China and East Asian general circulation. The results show that I LSQD more closely reflects the anomalous variations in summer monsoon phenomena; in the high-index (HI) cases, the strong low-level southerlies over East China and the strong high-level westerlies over middle latitudes indicate an active summer monsoon, and vice versa in the low-index (LI) cases. This index also reflects summer rainfall anomalies over East China; in the HI (LI) cases rainfall increases (decreases) over North China and at the same time decreases (increases) over the mid-lower Yangtze River valley and the southern Yangtze River. Hence, I LSQD can be utilized as a summer monsoon index. There is also remarkable correlation between I LSQD in March and the following summer rainfall over the mid-lower Yangtze River valley. Finally, the Community Atmospheric Model Version 3.1 (CAM3.1) of NCAR is used to run numerical experiments, which verify that the anomalous summer precipitation in simulations is similar to that of diagnosis analysis based on the anomalous summer atmospheric heating forcing. Similarly, the atmospheric heating rate in March can force summer rainfall anomalies in the simulations just as observed in the data. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 land-sea atmospheric heat source difference index nationallicence East Asian summer monsoon nationallicence summer rainfall nationallicence forecasting meaning nationallicence Zhang Bo Chinese Academy of Meteorological Sciences, 100081, Beijing, China aut Zhou XiuJi Chinese Academy of Meteorological Sciences, 100081, Beijing, China aut Chen LongXun Chinese Academy of Meteorological Sciences, 100081, Beijing, China aut Zhu YanFeng National Climate Center, 100081, Beijing, China aut Zhao Bin National Meteorological Center, 100081, Beijing, China aut Science China Earth Sciences SP Science China Press 53/11(2010-11-01), 1734-1746 1674-7313 53:11<1734 2010 53 11430 https://doi.org/10.1007/s11430-010-4024-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-4024-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Bo Chinese Academy of Meteorological Sciences, 100081, Beijing, China aut NATIONALLICENCE 700 1- Zhou XiuJi Chinese Academy of Meteorological Sciences, 100081, Beijing, China aut NATIONALLICENCE 700 1- Chen LongXun Chinese Academy of Meteorological Sciences, 100081, Beijing, China aut NATIONALLICENCE 700 1- Zhu YanFeng National Climate Center, 100081, Beijing, China aut NATIONALLICENCE 700 1- Zhao Bin National Meteorological Center, 100081, Beijing, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/11(2010-11-01), 1734-1746 1674-7313 53:11<1734 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer