Google Earth Engine——城市群昼夜温度数据集包含了全世界超过10,000个城市群的年度、夏季和冬季的地表热岛（SUHI）强度的昼夜变化。该产品既有像素级（降尺度后为300米分辨率）

YCEO Surface Urban Heat Islands: Pixel-Level Composites of Yearly Summertime Daytime and Nighttime Intensity

This dataset contains annual, summertime, and wintertime surface urban heat island (SUHI) intensities for day and night for over 10,000 urban clusters throughout the world. The dataset was created using the MODIS 8-day TERRA and AQUA land surface temperature (LST) products, the Landscan urban extent database, the Global Multi-resolution Terrain Elevation Data 2010, and the European Space Agency (ESA) Climate Change Initiative (CCI) land cover data using the Simplified Urban-Extent Algorithm. The product is available both at the pixel level (at 300 m resolution after downscaling) and as urban cluster means from 2003 to 2018. The monthly composites are only available as urban cluster means.

A summary of older versions, including changes from the dataset created and analyzed in the originally published manuscript can be found on the Yale Center for Earth Observation website. The dataset can also be explored using the Global Surface UHI Explorer web application.

The dataset is split into the following six components:

1. UHI_all_averaged: Image containing cluster-mean composite daytime and nighttime SUHI intensity for annual, summer, and winter.
   
2. UHI_monthly_averaged: Image containing cluster-mean monthly composites of daytime and nighttime SUHI intensity.
   
3. UHI_yearly_averaged: Image collection of cluster-mean yearly composites of daytime and nighttime SUHI intensity from 2003. to 2018.
   
4. UHI_yearly_pixel: Image collection of spatially disaggregated (nominal scale of 300 m) annual daytime and nighttime SUHI intensity from 2003 to 2018.
   
5. Summer_UHI_yearly_pixel: Image collection of spatially disaggregated (nominal scale of 300 m) summertime daytime and nighttime SUHI intensity from 2003 to 2018.
   
6. Winter_UHI_yearly_pixel: Image collection of spatially disaggregated (nominal scale of 300 m) wintertime daytime and nighttime SUHI intensity from 2003 to 2018.
   

This asset is the fifth component.

该数据集包含了全世界超过10,000个城市群的年度、夏季和冬季的地表热岛（SUHI）强度的昼夜变化。该数据集使用MODIS 8天TERRA和AQUA地表温度（LST）产品、Landscan城市范围数据库、2010年全球多分辨率地形高程数据以及欧洲航天局（ESA）气候变化倡议（CCI）土地覆盖数据，使用简化城市范围算法创建。该产品既有像素级（降尺度后为300米分辨率），也有2003至2018年的城市群平均值。月度综合资料只提供城市群平均值。

在耶鲁大学地球观测中心的网站上可以找到旧版本的摘要，包括从最初发表的手稿中创建和分析的数据集的变化。该数据集也可以使用全球地表UHI Explorer网络应用程序进行探索。

该数据集被分成以下六个部分。

UHI_all_averaged。图片包含全年、夏季和冬季的白天和夜间SUHI强度的群集平均值。

UHI_monthly_averaged: 包含日间和夜间SUHI强度的群集平均月度合成图。

UHI_yearly_averaged: 2003年至2018年日间和夜间SUHI强度的群集平均年度合成图像集。

UHI_yearly_pixel: 2003年至2018年日间和夜间SUHI强度的空间分类（标称尺度为300米）图像集。

夏天_UHI_yearly_pixel。2003年至2018年夏季白天和夜间SUHI强度的空间分类（标称规模为300米）图像集。

冬季_UHI_yearly_pixel。2003年至2018年冬季白天和夜间SUHI强度的空间分类（标称比例为300米）图像集。

这项资产是第五部分。

Dataset Availability

2003-01-01T00:00:00 - 2018-12-31T00:00:00

Dataset Provider

Yale Center for Earth Observation (YCEO)

Collection Snippet

ee.ImageCollection("YALE/YCEO/UHI/Summer_UHI_yearly_pixel/v4")

Resolution

300 meters

Bands Table

引用：

Chakraborty, T., & Lee, X. (2019). A simplified urban-extent algorithm to characterize surface urban heat islands on a global scale and examine vegetation control on their spatiotemporal variability. International Journal of Applied Earth Observation and Geoinformation, 74, 269-280. doi:10.1016/j.jag.2018.09.015

代码：

var dataset = ee.ImageCollection("YALE/YCEO/UHI/Summer_UHI_yearly_pixel/v4");
var visualization = {
  bands: ['Daytime'],
  min: -1.5,
  max: 7.5,
  palette: [
    "#313695","#74add1","#fed976","#feb24c","#fd8d3c","#fc4e2a",
    "#e31a1c","#b10026",
  ]
};
Map.setCenter(-74.7, 40.6, 7);
Map.addLayer(dataset, visualization, "Daytime UHI");

其他版本：

YALE_YCEO_UHI_UHI_all_averaged_v4

YCEO Surface Urban Heat Islands: Spatially-Averaged Daytime and Nighttime Intensity for Annual, Summer, and Winter

YALE_YCEO_UHI_UHI_monthly_averaged_v4

YCEO Surface Urban Heat Islands: Spatially-Averaged Monthly Composites of Daytime and Nighttime Intensity

YALE_YCEO_UHI_UHI_yearly_averaged_v4

YCEO Surface Urban Heat Islands: Pixel-Level Annual Daytime and Nighttime Intensity

YALE_YCEO_UHI_UHI_yearly_pixel_v4

YCEO Surface Urban Heat Islands: Pixel-Level Yearly Composites of Wintertime Daytime and Nighttime Intensity

YALE_YCEO_UHI_Winter_UHI_yearly_pixel_v4

YCEO Surface Urban Heat Islands: Spatially-Averaged Yearly Composites of Annual Daytime and Nighttime Intensity