Google Earth Engine ——数据全解析专辑（COPERNICUS/S5P/NRTI/L3_CO）实时的 CO 浓度高分辨率图像数据集

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发布于 2024-05-24 08:54:02

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发布于 2024-05-24 08:54:02

NRTI/L3_CO

This dataset provides near real-time high-resolution imagery of CO concentrations.

Carbon monoxide (CO) is an important atmospheric trace gas for understanding tropospheric chemistry. In certain urban areas, it is a major atmospheric pollutant. Main sources of CO are combustion of fossil fuels, biomass burning, and atmospheric oxidation of methane and other hydrocarbons. Whereas fossil fuel combustion is the main source of CO at northern mid-latitudes, the oxidation of isoprene and biomass burning play an important role in the tropics. TROPOMI on the Sentinel 5 Precursor (S5P) satellite observes the CO global abundance exploiting clear-sky and cloudy-sky Earth radiance measurements in the 2.3 µm spectral range of the shortwave infrared (SWIR) part of the solar spectrum. TROPOMI clear sky observations provide CO total columns with sensitivity to the tropospheric boundary layer. For cloudy atmospheres, the column sensitivity changes according to the light path. [More information]

NRTI/L3_CO 该数据集提供了近乎实时的 CO 浓度高分辨率图像。

一氧化碳 (CO) 是一种重要的大气痕量气体，可用于了解对流层化学。在某些城市地区，它是一种主要的大气污染物。 CO 的主要来源是化石燃料的燃烧、生物质燃烧以及甲烷和其他碳氢化合物的大气氧化。在中纬度北部，化石燃料燃烧是 CO 的主要来源，而异戊二烯的氧化和生物质燃烧在热带地区起着重要作用。 Sentinel 5 Precursor (S5P) 卫星上的 TROPOMI 利用太阳光谱短波红外 (SWIR) 部分 2.3 µm 光谱范围内的晴空和多云天空地球辐射测量值观测 CO 全球丰度。 TROPOMI 晴空观测提供了对对流层边界层敏感的 CO 总列。对于多云环境，色谱柱灵敏度根据光路而变化。 [更多信息]

Dataset Availability

2018-11-22T12:00:13 - 2021-09-05T00:00:00

Dataset Provider

European Union/ESA/Copernicus

Collection Snippet

ee.ImageCollection("COPERNICUS/S5P/NRTI/L3_CO")

Resolution

0.01 degrees

Bands Table

Name	Description	Min*	Max*	Units
CO_column_number_density	Vertically integrated CO column density.	-279	4.64	mol/m^2
H2O_column_number_density	Water vapor column.	-465360	34584412	mol/m^2
cloud_height	Scattering layer height.	-8341	5000	m
sensor_altitude	Altitude of the satellite with respect to the geodetic sub-satellite point (WGS84).	828542	856078	m
sensor_azimuth_angle	Azimuth angle of the satellite at the ground pixel location (WGS84); angle measured East-of-North.	-180	180	degrees
sensor_zenith_angle	Zenith angle of the satellite at the ground pixel location (WGS84); angle measured away from the vertical.	1	66	degrees
solar_azimuth_angle	Azimuth angle of the Sun at the ground pixel location (WGS84); angle measured East-of-North.	-180	180	degrees
solar_zenith_angle	Zenith angle of the satellite at the ground pixel location (WGS84); angle measured away from the vertical.	9	80	degrees

* = Values are estimated

Name	Type	Description
ALGORITHM_VERSION	String	The algorithm version used in L2 processing. It's separate from the processor (framework) version, to accommodate different release schedules for different products.
BUILD_DATE	String	The date, expressed as milliseconds since 1 Jan 1970, when the software used to perform L2 processing was built.
HARP_VERSION	Int	The version of the HARP tool used to grid the L2 data into an L3 product.
INSTITUTION	String	The institution where data processing from L1 to L2 was performed.
L3_PROCESSING_TIME	Int	The date, expressed as milliseconds since 1 Jan 1970, when Google processed the L2 data into L3 using harpconvert.
LAT_MAX	Double	The maximum latitude of the asset (degrees).
LAT_MIN	Double	The minimum latitude of the asset (degrees).
LON_MAX	Double	The maximum longitude of the asset (degrees).
LON_MIN	Double	The minimum longitude of the asset (degrees).
ORBIT	Int	The orbit number of the satellite when the data was acquired.
PLATFORM	String	Name of the platform which acquired the data.
PROCESSING_STATUS	String	The processing status of the product on a global level, mainly based on the availability of auxiliary input data. Possible values are "Nominal" and "Degraded".
PROCESSOR_VERSION	String	The version of the software used for L2 processing, as a string of the form "major.minor.patch".
PRODUCT_ID	String	Id of the L2 product used to generate this asset.
PRODUCT_QUALITY	String	Indicator that specifies whether the product quality is degraded or not. Allowed values are "Degraded" and "Nominal".
SENSOR	String	Name of the sensor which acquired the data.
SPATIAL_RESOLUTION	String	Spatial resolution at nadir. For most products this is `3.5x7km2`, except for `L2__O3__PR`, which uses `28x21km2`, and `L2__CO____` and `L2__CH4___`, which both use `7x7km2`. This attribute originates from the CCI standard.
TIME_REFERENCE_DAYS_SINCE_1950	Int	Days from 1 Jan 1950 to when the data was acquired.
TIME_REFERENCE_JULIAN_DAY	Double	The Julian day number when the data was acquired.
TRACKING_ID	String	UUID for the L2 product file.

代码：

var collection = ee.ImageCollection('COPERNICUS/S5P/NRTI/L3_CO')
  .select('CO_column_number_density')
  .filterDate('2019-06-01', '2019-06-11');

var band_viz = {
  min: 0,
  max: 0.05,
  palette: ['black', 'blue', 'purple', 'cyan', 'green', 'yellow', 'red']
};

Map.addLayer(collection.mean(), band_viz, 'S5P CO');
Map.setCenter(-25.01, -4.28, 4);