Climate Characteristics of High-Temperature and Muggy Days in the Beijing-Tianjin-Hebei Region in the Recent 30 Years

Guohua Zhang,Jingyi Ai,Jian Guan,Xiaoqing Jin,Jiangtao Zhang

doi:10.1155/2015/507518

Abstract

The climate characteristics of high-temperature (37°C and above) and muggy days in the Beijing-Tianjin-Hebei region over the past 30 years from 1981 to 2010 are analyzed. The results are summarized as follows. During this period, the years with the most number of high-temperature days are 1997–2005 and 2009 in the Beijing-Tianjin-Hebei region, while high-temperature extremes appear in 1999, 2000, 2002, 2009, and 2010. This disparity between the years with high-temperature extremes and the years with the most number of high-temperature days is located primarily in the central and southern cities of the Beijing-Tianjin-Hebei region. High-temperature extremes in the southern cities appear in June and July, while high-temperature extremes in the other cities appear in July. The years with the most number of muggy days are 1994, 1997, 1998, 2000, and 2010 in the Beijing-Tianjin-Hebei region, but the years with the extreme muggy conditions appear in 1981, 2002, 2005, and 2010. The most number of muggy days are in July, and the muggy days in July and August account for about 90% of the entire summer. Over the 30-year period, no apparent changes are observed in the number of days with precipitation and the annual precipitation amount.

Highlights

Global climate change has become a hot issue of common concern to the scientific community, national governments, and public society
High-temperature weather and muggy weather present a serious threat to human comfort, economic development, water resources, and the environment
Through an analysis of hightemperature days in North China, Wei and Sun [7] found that, in the 1960s, a high-pressure ridge controlled the most part of North China, leading to a peak of high temperature

Summary

Introduction

Global climate change has become a hot issue of common concern to the scientific community, national governments, and public society. Through an analysis of hightemperature days in North China, Wei and Sun [7] found that, in the 1960s, a high-pressure ridge controlled the most part of North China, leading to a peak of high temperature (not muggy conditions). In the 1990s, North China was controlled by the continental high pressure ridge and the western Pacific subtropical high, thereby causing high-temperature extremes and muggy conditions. Gao et al [8] analyzed the atmospheric circulation, temperature, humidity, and water vapor transport characteristics of a typical high-temperature and high-humidity weather event in summer in Beijing. Most of the above researches focus on the characteristics of high-temperature weather or muggy weather for a certain station only, while there are few studies on high-temperature and muggy days for the entire Beijing-Tianjin-Hebei region

Data and Methods

Findings

Conclusions