Summer extreme heat events happen frequently in northern China during recent decades. which have serious impacts on the society and ecosystem. The present study reveals that there is a synergistic effect of the preceding winter positive mid-latitude North Atlantic SST anomaly (pMNA SSTA) and summer negative tropical eastern Indian Ocean SST anomaly (nTEI SSTA) on strengthening the sum... https://parisnaturalfoodes.shop/product-category/chromium-plus/