OPeNDAP Data Access Form for MODIS_CR.EqualAngle_3h.C61.V1.0.L3.2011.nc4
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dataset: MODIS_CR.EqualAngle_3h.C61.V1.0.L3.2011.nc4

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Data URL
Global Attributes
  • HDF5_GLOBAL
    • ShortName: MODIS_CR_Equal_Angle_3h
    • LongName: MODIS Cloud Regime Level-3 3-Hourly 1 deg x 1 deg
    • title: MODIS_CR_Equal_Angle_3h
    • VersionID: 1.0
    • history: [20210628]T[174333]Z : original file created at NASA GSFC
    • Format: NetCDF4
    • ProcessingLevel: Level-3
    • IdentifierProductDOIAuthority: http://dx.doi.org/
    • IdentifierProductDOI: 10.5067/MEASURES/MODISCR/EQANG3H/DATA301
    • Conventions: CF-1.7
    • source: MODIS
    • MapProjection: Geographic Equidistant Cylindrical Projection
    • DataSetQuality: Equal-Area gridding of MODIS data is verified to be consistent with official Level-3 products. Cloud regimes derived from k-means clustering are checked for robustness by repetition with different random seeds. Final cloud regimes are evaluated against CloudSat/CALIPSO.
    • ContactPersonName: Lazaros Oreopoulos
    • ContactPersonEmail: lazaros.oreopoulos@nasa.gov
    • institution: NASA Goddard Space Flight Center
    • InputDataProducts: MODIS_CR_Equal_Area_3h
    • InputDataProductVersion: 1.0
    • GranuleID: MODIS_CR.EqualAngle_3h.C61.V1.0.L3.2011.nc4
    • references: Cho, N., J. Tan, and L. Oreopoulos, 2021: Classifying planetary cloudiness with an updated set of MODIS Cloud Regimes. Journal of Applied Meteorology and Climatology, in press, https://doi.org/10.1175/JAMC-D-20-0247.1.
    • ProductionDateTime: 2021-06-28T17:43:34Z
    • RangeBeginningDate: 2010-12-31
    • RangeBeginningTime: 22:30:00
    • RangeEndingDate: 2011-12-31
    • RangeEndingTime: 22:29:59
    • SouthernmostLatitude: -90
    • NorthernmostLatitude: 90
    • WesternmostLongitude: -180
    • EasternmostLongitude: 180
    • Description: 1 deg x 1 deg MODIS Cloud Regime (CR) derived from interpolating from 110-km equal-area MODIS CRs. Equal-area MODIS CRs derived from k-means clustering of 16 years (2003–2018) of MODIS Terra and Aqua Collection 6.1 observations of cloud top pressure and cloud optical thickness gridded in a 110-km equal-area grid. Only joint-histograms with at least 120 pixels are ingested into the k-means clustering using a subset based on latitude such that the global sampling is representative.
    • comment: 1 deg x 1 deg MODIS Cloud Regime (CR) derived from interpolating from 110-km equal-area MODIS CRs. Equal-area MODIS CRs derived from k-means clustering of 16 years (2003–2018) of MODIS Terra and Aqua Collection 6.1 observations of cloud top pressure and cloud optical thickness gridded in a 110-km equal-area grid. Only joint-histograms with at least 120 pixels are ingested into the k-means clustering using a subset based on latitude such that the global sampling is representative.
Variables
MODIS_Terra_CR[ time= 0 ..2919] [ latitude= 0 ..179] [ longitude= 0 ..359] (Type is Int32)
  • attributes
    • long_name: MODIS_Terra_Cloud_Regime
    • _FillValue: -99
    • units: 1
    • valid_range: 1, 12
    • comments: CR1 to CR11 are outputs from the k-means clustering. CR12 is the clear sky regime.
    • coordinates: longitude latitude time
    • origname: MODIS_Terra_CR
    • fullnamepath: /MODIS_Terra_CR
COT_bounds[ COT= 0 ..5] [ edge= 0 ..1] (Type is Float32)
  • attributes
    • long_name: bounds_of_cloud_optical_thickness_bin
    • valid_range: 0, 150
    • coordinates: edge COT
    • origname: COT_bounds
    • fullnamepath: /COT_bounds
centroids[ cr= 0 ..11] [ CTP= 0 ..6] [ COT= 0 ..5] (Type is Float32)
  • attributes
    • long_name: centroids_of_cloud_regimes
    • _FillValue: -999.0000000
    • units: %
    • valid_range: 0, 100
    • comments: global mean of all 2003-2019 joint histograms assigned to CR
    • coordinates: COT CTP cr
    • origname: centroids
    • fullnamepath: /centroids
MODIS_Aqua_CR[ time= 0 ..2919] [ latitude= 0 ..179] [ longitude= 0 ..359] (Type is Int32)
  • attributes
    • long_name: MODIS_Aqua_Cloud_Regime
    • _FillValue: -99
    • units: 1
    • valid_range: 1, 12
    • comments: CR1 to CR11 are outputs from the k-means clustering. CR12 is the clear sky regime.
    • coordinates: longitude latitude time
    • origname: MODIS_Aqua_CR
    • fullnamepath: /MODIS_Aqua_CR
CTP_bounds[ CTP= 0 ..6] [ edge= 0 ..1] (Type is Float32)
  • attributes
    • long_name: bounds_of_cloud_top_pressure_bin
    • valid_range: 0, 1100
    • coordinates: edge CTP
    • origname: CTP_bounds
    • fullnamepath: /CTP_bounds
COT[ COT= 0 ..5] (Type is Float32)
  • attributes
    • long_name: cloud optical thickness dimension
    • units: 1
    • bounds: COT_bounds
    • origname: COT
    • fullnamepath: /COT
CTP[ CTP= 0 ..6] (Type is Float32)
  • attributes
    • long_name: cloud top pressure dimension
    • units: hPa
    • bounds: CTP_bounds
    • origname: CTP
    • fullnamepath: /CTP
cr[ cr= 0 ..11] (Type is Int32)
  • attributes
    • long_name: index of Cloud Regime
    • units: 1
    • origname: cr
    • fullnamepath: /cr
edge[ edge= 0 ..1] (Type is Float32)
  • attributes
    • long_name: lower limit, upper limit
    • units: 1
    • origname: edge
    • fullnamepath: /edge
latitude[ latitude= 0 ..179] (Type is Float32)
  • attributes
    • long_name: latitude
    • units: degrees_north
    • valid_range: -90, 90
    • origname: latitude
    • fullnamepath: /latitude
longitude[ longitude= 0 ..359] (Type is Float32)
  • attributes
    • long_name: longitude
    • units: degrees_east
    • valid_range: -180, 180
    • origname: longitude
    • fullnamepath: /longitude
time[ time= 0 ..2919] (Type is Float32)
  • attributes
    • long_name: time
    • units: days since 2000-03-01 00:00:00
    • comments: UTC hour at center of window
    • calendar: none
    • origname: time
    • fullnamepath: /time
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