摘要
本文应用河北省沿海气象站1961年-2005年45年逐年各月气温、降水量、日照时数、风速等资料,利用Penman-Monteith公式计算了各月潜在蒸散量,并应用气候倾向率、气候趋势系数、Mann-Kendall非参数检验、相关分析等方法,分析了各月气候条件、海盐生产季节气候要素的变化趋势、以及气候变化对海盐生产的影响。结果表明,河北省3月-6月和9月-10月是最适宜海盐生产的季节;海盐生产季节各要素的变化特征为:气温呈上升趋势、降水量为增加趋势、日照时数和蒸散量均为减少趋势,并且这种变化趋势是显著的;蒸散量是影响海盐生产的主要因素,而造成蒸散量减少的主要影响因素是日照时数的减少;综合考虑,目前气候的变化趋势对海盐生产将产生不利影响。
Investigating the impacts of climate change on sea-salt production for sea-salt production season would gainfully improve the responsiveness of sea-salt production, make the best of climatic resources, and ultimately ensure stability and high-yield production of sea-salt. In the present work, the authors carefully examine climate change on sea-salt production using time series of routinely observed meteorological data, encompassing temperature, precipitation, evaporation, sunshine hours and wind speed from Nanpu and Huanghua stations located in coastal region of Hebei province during the period of 1961-2005. Nanpu County, located in the north coast of Hebei province, ranks first in annual salt output in Asia and third worldwide. In addition, Huanghua, located in the southern littoral area of Hebei Province, is also one of the most important salt production areas. First, the potential evapotranspiration for each month each year for the two stations were calculated using the Penman-Monteith equation. The most appropriate season for salt production has been subsequently determined by taking potential evapotranspiration as a main factor, simultaneously considering precipitation, rainy days, sunshine hours and so forth. Second, we successfully applied the Mann-Kendall nonparametric test, regression analysis and correlation analysis to detect trends of climatic variables in sea-salt production season and their relationships. The characteristics of the time series variables that showed greatly changes were further studied. Third, the correlation between potential evapotranspiration and temperature, precipitation, and sunshine hours was analyzed in detail. The main reason for a reduction in potential evapotranspiration and the effects of climate change on sea-salt production were also discussed. The results indicated that the period from March to June and from September to October in Hebei Province could be the most appropriate season for salt production. It was found that the mean temperature, mean maximum temperature a
出处
《资源科学》
CSSCI
CSCD
北大核心
2010年第1期132-138,共7页
Resources Science
基金
国家海洋局项目:"我国近海海洋综合调查与评价"(编号:908-SJ-HB-01-02-09)
