MCD19A2.061: Terra & Aqua MAIAC Land Aerosol Optical Depth Daily 1km

Dataset Availability

2000-02-24T00:00:00Z–2024-04-14T23:55:00Z

Dataset Provider

NASA LP DAAC at the USGS EROS Center

Earth Engine Snippet

ee.ImageCollection("MODIS/061/MCD19A2_GRANULES")

Tags

aerosol aod aqua daily global maiac modis nasa terra usgs

mcd19a2

Description

The MCD19A2 V6.1 data product is a MODIS Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth (AOD) gridded Level 2 product produced daily at 1 km resolution. For more information see the MAIAC user guide.

NOTE: This product has been released with the caveat that the reprocessing for the full mission is expected to continue through summer 2023.

Bands

Resolution
1000 meters

Bands

Name	Units	Min	Max	Scale	Description
Optical_Depth_047		-100	8000	0.001	Aerosol optical depth over land retrieved in the MODIS Blue band (0.47 μm). AOD is not received at high altitude (greater than 4.2 km) except when smoke or dust is detected; rather, we report a static value of 0.02 used for atmospheric correction.
Optical_Depth_055		-100	8000	0.001	Aerosol optical depth over land retrieved in the MODIS Green band (0.55 μm).
AOD_Uncertainty		0	30000	0.0001	AOD uncertainty based on blue-band surface brightness (reflectance)
FineModeFraction		0	1000		Fine mode fraction for ocean and large inland lakes
Column_WV	cm	0	30000	0.001	Column water vapor over land, retrieved from MODIS near-IR bands at 0.94 μm. When reported for cloudy pixels, it represents water vapor above the cloud.
AOD_QA					AOD QA
Bitmask for AOD_QA Bits 0-2: Cloud mask 0: Undefined 1: Clear 2: Possibly cloudy (detected by AOD filter) 3: Cloudy (detected by cloud mask algorithm) 5: Cloud shadow 6: Hot spot of fire 7: Water sediments Bits 3-4: Land water snow/ice mask 0: Land 1: Water 2: Snow 3: Ice Bits 5-7: Adjacency mask 0: Normal condition/Clear 1: Adjacent to clouds 2: Surrounded by more than 4 cloudy pixels 3: Adjacent to a single cloudy pixel 4: Adjacent to snow 5: Snow was previously detected in this pixel Bits 8-11: QA for AOD 0: Best quality 1: Water Sediments are detected (water) 3: There is 1 neighbor cloud 4: There is >1 neighbor clouds 5: No retrieval (cloudy, or whatever) 6: No retrievals near detected or previously detected snow' 7: Climatology AOD - altitude above 3.5km (water) and 4.2km (land)' 8: No retrieval due to sun glint (water) 9: Retrieved AOD is very low (<0.05) due to glint (water) 10: AOD within +-2km from the coastline is replaced by nearby AOD 11: Land, research quality: AOD retrieved but CM is possibly cloudy Bit 12: Glint mask 0: No glint 1: Glint (glint angle < 40°) Bits 13-14: Aerosol model 0: Background model (regional) 1: Smoke model (regional) 2: Dust model Bit 15: Reserved 0: Reserved for future use 1: Reserved for future use
Injection_Height	m	0	10000		Smoke injection height
AngstromExp_470-780				0.0001	Angstrom exponent 470-780nm over the ocean
cosSZA		0	10000	0.0001	Cosine of solar zenith angle (5 km resolution)
cosVZA		0	10000	0.0001	Cosine view zenith angle (5 km resolution)
RelAZ		-18000	18000	0.01	Relative azimuth angle (5 km resolution)
Scattering_Angle		-18000	18000	0.01	Scattering angle (5 km resolution)
Glint_Angle		-18000	18000	0.01	Glint angle (5 km resolution)

Terms of Use

Terms of Use

MODIS data and products acquired through the LP DAAC have no restrictions on subsequent use, sale, or redistribution.

Citations

Citations:

• Please visit LP DAAC 'Citing Our Data' page for information on citing LP DAAC datasets.

DOIs

• https://doi.org/10.5067/MODIS/MCD19A2.061

Explore with Earth Engine

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Code Editor (JavaScript)

var collection = ee.ImageCollection('MODIS/061/MCD19A2_GRANULES')
                     .select('Optical_Depth_047')
                     .filterDate('2023-01-01', '2023-01-15');

var band_viz = {
  min: 0,
  max: 1100,
  palette: ['black', 'blue', 'purple', 'cyan', 'green', 'yellow', 'red']
};

Map.addLayer(collection.mean(), band_viz, 'Optical Depth 047');
Map.setCenter(76, 13, 6);

Open in Code Editor

MCD19A2.061: Terra & Aqua MAIAC Land Aerosol Optical Depth Daily 1km

The MCD19A2 V6.1 data product is a MODIS Terra and Aqua combined Multi-angle Implementation of Atmospheric Correction (MAIAC) Land Aerosol Optical Depth (AOD) gridded Level 2 product produced daily at 1 km resolution. For more information see the MAIAC user guide. NOTE: This product has been released with the caveat …

MODIS/061/MCD19A2_GRANULES, aerosol,aod,aqua,daily,global,maiac,modis,nasa,terra,usgs

2000-02-24T00:00:00Z/2024-04-14T23:55:00Z

Google Earth Engine

https://developers.google.com/earth-engine/datasets

• https://doi.org/10.5067/MODIS/MCD19A2.061