Question

在下英语不好，请帮我翻译一下论文的摘要，翻成英文，万分谢谢！！

利用MODIS时间分辨率高的优势，将其一天四次的地表温度产品用于分析长时间段上的热岛问题。用各年均值分析空间分布特征，温度等级变化来分析时间变化特征，统计分析2002~2015年兰州市的热岛特征，结果表明：（1）兰州市热岛主要分布在位于中部河谷地区的市区及其周边地势较低的地区，并逐年向北扩展；（2）2002-2015年热岛面积持续增加，高温区累计增长83km2，年增长速率为0.05%，年增长面积趋势为143.03km2。次高温区面积每年增长41.23km2，累计增长802km2。热岛的增长趋于缓慢；（3）兰州市热岛的月变化大致呈余弦函数变化，3月和6月为峰值，7-10月热岛也较显著且基本持平。兰州市热岛在下季最为显著，其次是春季和秋季，冬季的热岛效应最弱，其高温区面积分别为4694km2、4511km2、4356km2和1452km2。

Answer 1

By taking the advantage of the high temporal resolution of MODIS, the surface temperature product is used to analyze the long-time heat island problem four times a day. The analysis of the spatial distribution characteristics made by using the annual mean and that of the time variation characteristics (made) by using the temperature level variation, the result of the statistical anaysis on the 2002~2015 urban heat island characteristics in Lanzhou City indicates that:
(1) the urban heat island of Lanzhou is mainly distributed in the urban areas located in the central river valley and its surrounding low-lying areas, and extends northward year by year ;
(2) the 2002-2015 heat island area continues to increase. The cumulative growth is 83km2 in the high temperature zone, the annual growth rate ( is) 0.05% and the annual growth trend for area (is) 143.03km2. The area of the sub high temperature increases 41.23km2 per year and the cumulative growth is 802km2. The gowth of the heat island tends to be slow;
(3) the monthly variation of the heat island in Lanzhou is roughly the cosine function, the peak value appears in March and June, the heat island vatiation is also significant and basically flat from July to October. The heat island variation of Lanzhou City is the most significant in summer, followed by spring and autumn. The heat island effect is the weakest in winter. whose area of the high temperature is separately 4694km2, 4511km2, 4356km2 and 1452km2.

Answer 2

利用MODIS时间分辨率高的优势，将其一天四次的地表温度产品用于分析长时间段上的热岛问题。用各年均值分析空间分布特征，温度等级变化来分析时间变化特征，统计分析2002~2015年兰州市的热岛特征，结果表明：（1）兰州市热岛主要分布在位于中部河谷地区的市区及其周边地势较低的地区，并逐年向北扩展；（2）2002-2015年热岛面积持续增加，高温区累计增长83km2，年增长速率为0.05%，年增长面积趋势为143.03km2。次高温区面积每年增长41.23km2，累计增长802km2。热岛的增长趋于缓慢；（3）兰州市热岛的月变化大致呈余弦函数变化，3月和6月为峰值，7-10月热岛也较显著且基本持平。兰州市热岛在下季最为显著，其次是春季和秋季，冬季的热岛效应最弱，其高温区面积分别为4694km2、4511km2、4356km2和1452km2。
Based on the advantage of MODIS time resolution, the surface temperature products of four times a day were used to analyze the heat island problem over a long time period. The results show that: (1) The heat island of Lanzhou is mainly distributed in the urban area in the central valley area and the urban area in the central valley region. (2) In 2002-2015, the area of heat island continued to increase, the total area of high-temperature area increased by 83 km2, the annual growth rate was 0.05%, and the annual growth area trend was 143.03 km2. The area of sub-high temperature increased by 41.23km2 per year, with a cumulative increase of 802km2. (3) Monthly variation of the heat island in Lanzhou is approximately cosine function variation, with peak values in March and June, and heat island in July-October is also significant and basically flat. The heat island of Lanzhou is the most significant in the next season, followed by spring and autumn. The heat island effect is the weakest in winter, and the high temperature area is 4694km2, 4511km2, 4355km2 and 1452km2 respectively.