Diurnal temperature range trend over North Carolina and the associated mechanisms

被引：17

作者：

Sayemuzzaman, Mohammad ^{[1
]}

Mekonnen, Ademe ^{[1
]}

Jha, Manoj K. ^{[2
]}

机构：

[1] North Carolina A&T State Univ, Energy & Environm Syst Dept, Greensboro, NC 27411 USA

[2] North Carolina A&T State Univ, Dept Civil Architectural & Environm Engn, Greensboro, NC 27411 USA

来源：

ATMOSPHERIC RESEARCH | 2015年 / 160卷

关键词：

Diurnal temperature range; Trends; Total cloud cover; Precipitation; Associative mechanism; SOIL-MOISTURE; PRECIPITATION; VARIABILITY; MAXIMUM; CLOUDS; SCALES;

D O I：

10.1016/j.atmosres.2015.03.009

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

This study seeks to investigate the variability and presence of trend in the diurnal surface air temperature range (DTR) over North Carolina (NC) for the period 1950-2009. The significance trend test and the magnitude of trends were determined using the non-parametric Mann-Kendall test and the Theil-Sen approach, respectively. Statewide significant trends (p < 0.05) of decreasing DTR were found in all seasons and annually during the analysis period. Highest (lowest) temporal DTR trends of magnitude -0.19 (-0.031) degrees C/decade were found in summer (winter). Potential mechanisms for the presence/absence of trend in DTR have been highlighted. Historical data sets of the three main moisture components (precipitation, total cloud cover (TCC), and soil moisture) and the two major atmospheric circulation modes (North Atlantic Oscillation and Southern Oscillation) were used for correlation analysis. The DTRs were found to be negatively correlated with the precipitation, TCC and soil moisture across the state for all the seasons and annual basis. It appears that the moisture components related better to the DTR than to the atmospheric circulation modes. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：99 / 108

页数：10

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