Daymet V3 provides gridded estimates of daily weather parameters for United States, Mexico, Canada, Hawaii, and Puerto Rico. It is derived from selected meteorological station data and various supporting data sources.
Compared to the previous version, Daymet V3 uses an entirely new suite of inputs including:
- NASA SRTM DEM version 2.1.
- Land/Water Mask: MODIS 250
MOD44W_v2.NASA_ORNL_ - Horizon files derived from the SRTM DEM.
- Ground station weather inputs from several sources with QA/QC.
Documentation:
Daymet V3提供美国、墨西哥、加拿大、夏威夷和波多黎各的每日天气参数的网格化估计。它是由选定的气象站数据和各种辅助数据来源得出的。
与前一版本相比，Daymet V3使用一套全新的输入，包括。
NASA SRTM DEM 2.1版。
土地/水掩码。MODIS 250 MOD44W_v2.NASA_ORNL_。
从SRTM DEM导出的地平线文件。
来自几个来源的地面站天气输入，有质量保证/质量控制。
文件。
ORNL DAAC数据集文档
数据集文档
该数据集的THREDDS位置
Dataset Availability
1980-01-01T00:00:00 - 2019-12-31T00:00:00
Dataset Provider
NASA ORNL DAAC at Oak Ridge National Laboratory
Collection Snippet
ee.ImageCollection("NASA/ORNL/DAYMET_V3")
Resolution
1000 meters
Bands Table
| Name | Description | Min* | Max* | Units |
| dayl | Duration of the daylight period. Based on the period of the day during which the sun is above a hypothetical flat horizon. | 0 | 86400 | seconds |
| prcp | Daily total precipitation, sum of all forms converted to water-equivalent. | 0 | 200 | mm |
| srad | Incident shortwave radiation flux density, taken as an average over the daylight period of the day. | 0 | 800 | W/m^2 |
| swe | Snow water equivalent, the amount of water contained within the snowpack. | 0 | 1000 | kg/m^2 |
| tmax | Daily maximum 2-meter air temperature. | -50 | 50 | °C |
| tmin | Daily minimum 2-meter air temperature. | -50 | 50 | °C |
| vp | Daily average partial pressure of water vapor. | 0 | 10000 | Pa |
* = Values are estimated
数据引用：
Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda, R.S.Vose, and R.B. Cook. {YEAR}. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version3. ORNL DAAC, Oak Ridge, Tennessee, USA
Other Citation Details - Thornton, P.E., M.M. Thornton, B.W. Mayer, Y. Wei, R. Devarakonda, R.S. Vose, and R.B. Cook. 2016. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 3. ORNL DAAC, Oak Ridge, Tennessee, USA. doi:10.3334/ORNLDAAC/1328
代码：
var dataset = ee.ImageCollection('NASA/ORNL/DAYMET_V3') .filter(ee.Filter.date('2017-04-01', '2017-04-30')); var maximumTemperature = dataset.select('tmax'); var maximumTemperatureVis = { min: -40.0, max: 30.0, palette: ['1621A2', 'white', 'cyan', 'green', 'yellow', 'orange', 'red'], }; Map.setCenter(-110.21, 35.1, 4); Map.addLayer(maximumTemperature, maximumTemperatureVis, 'Maximum Temperature');
