1.Lanzhou Institute of Arid Meteorology, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province/Key Open Laboratory of Arid Climatic Change and Disaster Reduction of CMA, Lanzhou 730020, China
2.Wuwei National Climate Observation Platform, Wuwei 733099, China
3.Minqin County Meteorological Bureau, Wuwei 733100, China
Based on monthly temperature and precipitation data of 5 national meteorological stations in Shiyang River Basin from 1960 to 2022, this study compared and analyzed differences between climatic values of the new climate state (1991-2020) and the old climate state (1981-2010),as well as its influence on climate assessment business in Shiyang River Basin. The results show that annual temperatures in the new and old climate states all showed an increasing trend, and annual precipitation showed a weak upward trend across the entire basin and various regions. From differences between new and old climate states: annual, seasonal and monthly temperatures generally exhibited consistent warming, which was most significant in spring, and least in winter. Monthly temperature rise varied greatly, with the largest in March, and the smallest in January and December. Spatial variations in temperature rise were also evident within the same month. Annual and seasonal precipitation showed a slight increase, which was the largest in autumn, and the least in spring. Monthly precipitation increase varied greatly, which was the largest in November, and the smallest in March. The precipitation in some individual months decreased, and precipitation increase also had obvious space difference in the same month. After updating the climatic mean values, the climate evaluation grades were overall adjusted to negative anomaly. The frequency of cold winter years increased, while that of warm winter years decreased. The climate state and events such as cold and warm winters based on the old climate state values require reassessment.
Forecast and Network Department of China Meteorological Administration.Notice on updating the climate average value in climate business[Z].Beijing:China Meteorological Administration,2021.(in Chinese)
[4]
王永光.多年平均值的改变对中国气候业务的影响[J].气象,2002,28(8):41-43.
[5]
WANGYongguang.The influences of normals change upon climate operation of China[J].Meteorological Monthly,2002,28(8):41-43.(in Chinese)
[6]
王秀文,李月安.新气候平均值在中期预报业务中的应用[J].气象,2003,29(1):43-45.
[7]
WANGXiuwen, LIYue’an.Application of new normals to med-range forecast operation[J].Meteorological Monthly,2003,29(1):43-45.(in Chinese)
LINJingjing, ZHANGQiang.Characteristics of China climate states change and its impact on the analysis of climate change[J].Plateau Meteorology,2015,34(6):1593-1600.(in Chinese)
MEIMei, HOUWei, ZHOUXingyan.The difference between new and old climate states and its impact on the assessment of climate and extreme event in China[J].Climate Change Research,2022,18(6):653-669.(in Chinese)
YANHongming, YUANYuan, WANGYongguang.Influence of climatological mean value change on climate operation in China under the global warming[J].Meteorological Monthly,2022,48(3):284-298.(in Chinese)
FANGYihe, ZHAOChunyu, WANGYing,et al.The difference between new and old climatic stage and its influence on climatic operation in the northeast China[J].Climate Change Research,2016,12(3):193-201.(in Chinese)
ZHANGMengmeng, ZHAOChunyu, FANGYihe,et al.Assessment and prediction of climate change in northeast China based on new climate state background[J].Journal of Meteorology and Environment,2023,39(4):95-102.(in Chinese)
LEIXiangjie, HUANGZuying, TIANWuwen,et al.Difference of two 30-year averages and its influence on operational climatic analysis[J].Meteorological Science and Technology,2005,33(2):124-127.(in Chinese)
WANGJinting, MAZhenfeng, YANGXiaobo,et al.Difference of two 30 years averages and its influence on operational climatic analysis[J].Plateau and Mountain Meteorology Research,2014,34(1):46-50.(in Chinese)
LIUGuifang, LUHeli.Research progress of climatic change in western China on the background of global warming[J].Meteorological and Environmental Sciences,2009,32(4):69-73.(in Chinese)
MAPengli, YANGJinhu, LUGuoyang,et al.The transitional change of climate in the east of Northwest China[J].Plateau Meteorology,2020,39(4):840-850.(in Chinese)
ZHANGJingli, WUXiulan, YAOJunqiang,et al.The difference between new and old climate states and its influence on climate operation in Xinjiang[J].Desert and Oasis Meteorology,2023,17(5):134-140.(in Chinese)
SUNShuang, GAOYuan, PEIYuhang,et al.The climate averages change from 1981 to 2010 and its impact on the climate evaluation in Heilongjiang province[J].Heilongjiang Meteorology,2014,31(2):1-3.(in Chinese)
HUANGCaiting, DONGBaohua, ZHAOGuannan,et al.Difference between new and old climatic states and its impact on the climate assessment in Jiangxi province[J].Meteorology and Disaster Reduction Research,2023,46(2):81-93.(in Chinese)
YANGXiaoling, DINGWenkui, YANGJinhu,et al.Change characteristics and 5 stations contrastive analysis of climate in eastern Hexi Corridor in recent 50 years[J].Agricultural Research in the Arid Areas,2011,29(5):259-268.(in Chinese)
LILingping, YANGYonglong, QIANLi.Analysis on the characteristics of temperature and precipitation in the Shiyang River Basin since recent 45 years[J].Arid Zone Research,2008,25(5):705-710.(in Chinese)
DINGZhenyu, MAJinzhu, ZHANGBaojun,et al.Analysis on the climate change in the Shiyang River Basin since resent 50 years[J].Arid Zone Research,2007,24(6):779-784.(in Chinese)
WEIBangxian, MIAOTing, LEIYu,et al.Analysis of climate change characteristics and drought change trend in Shiyang River Basin[J].Modern Agricultural Science and Technology,2017(15):220-222.(in Chinese)
[44]
魏凤英.现代气候统计诊断与预测技术[M].2版.北京:气象出版社,2007:37-41.
[45]
WEIFengying.Modern climatic statistical giagnosis and prediction technology[M].2nd ed.Beijing:Meteorological Press,2007:37-41.(in Chinese)
SHINeng, CHENJiaqi, TUQipu.4-phase climate change features in the last 100 years over China[J].Acta Meteorologica Sinica,1995,53(4):431-439.(in Chinese)
[48]
LivezeyR E, ChenW Y.Statistical field significance and its determination by Monte Carlo techniques[J].Mon Wea Rev,1983,111(1):46-59.
YAOJunqiang, LIMoyan, DilinuerTuoliewubieke,et al.The assessment on“warming-wetting”trend in Xinjiang at multi-scale during 1961-2019[J].Arid Zone Research,2022,39(2):333-346.(in Chinese)
BAISuqin.The influence of two different climate normals on climate assessment in Xinjiang[J].Desert and Oasis Meteorology,2016,10(1):88-94.(in Chinese)
ZHOUXiaoyu, ZHAOChunyu.Analysis of changes in the old and new climate averages and impacts in Liaoning Province[J].Desert and Oasis Meteorology,2023,17(3):149-156.(in Chinese)
LIUYunyun, WANGYongguang, KEZongjian.Characteristics and possible causes for the climate anomalies over China in summer 2020[J].Meteorological Monthly,2021,47(1):117-126.(in Chinese)
YANGXiaoling, ZHOUHua, CHENJing,et al.Temperature in different climate states and their influence on climate evaluation in the Hexi Corridor Eastern[J].Arid Zone Research,2024,41(7):1089-1098.(in Chinese)
WANGYongguang, GONGZhensong, XULi,et al.Analysis of long trend of temperature and precipitation in China and its influencing factors[J].Journal of Applied Meteorological Science,2005,16(S1):85-91.(in Chinese)
[63]
雷杨娜.中国近50年夏季高温时空变化特征及其影响因子分析[D].北京:北京师范大学,2009.
[64]
LEIYangna.The changes of summer hot days in East China during the last 50 years[D].Beijing:Beijing Normal University,2009.(in Chinese)