中文摘要：

以长江三角洲地区为研究区，利用2005年全年的MODIS地表温度产品和气象观测资料，定量分析了地表温度年内变化规律与气候因子之间的时滞响应关系。首先，通过谐波分析方法（Harmonic Analysis of Time Series，HANTS）消除地表温度数据中云的影响，提取地表温度时间序列谐波（即周期变化规律），重建地表温度无云时间序列；然后，利用DEM和纬度数据计算了研究区太阳辐射的空间分布，并将其与地表温度的年内变化进行时滞相关分析。0．9916的相关系数表明：太阳辐射是地表温度年周期变化的主要控制因素，地表温度峰值出现的时间相对于太阳辐射时间而言滞后20d左右；时滞相关分析表明，地表温度和气温之间的年内变化规律呈极显著相关，气温的变化相对于地表温度存在约5d左右的滞后响应。

英文摘要：

With the Yangtze River delta as the study area, this paper quantitatively analyzed the temporal responses of land surface temperature annual variability to climate factors based on MODIS LST products and meteorological observation data. First, the Harmonic Analysis of Time Series （HANTS） algorithm was employed to distill LST harmonics （periodical fluctuation characters） and reconstruct cloud - free LST time - series. The solar radiation of the study area was calculated and its impact on LST inter - annual was investigated by time lag cross - correlation analysis. The high correlation coefficient （ mean coefficient is 0. 991 6 ） indicates the sensitivity of LST seasonal variations to solar radiance, and lag days show that the peak time of LST is about 20 days later than solar radiance. The analysis between the inter - annual variations of land surface temperature and air temperature shows that air temperature has significant correlations with LST and the air temperature delays about 5 days relative to LST seasonal fluctuation.