| ShortName: | MODIS_CR_Equal_Area_3h |
| LongName: | MODIS Cloud Regime Level-3 3-Hourly 110-Km-Equal-Area |
| title: | MODIS_CR_Equal_Area_3h |
| VersionID: | 1.0 |
| history: | [20210709]T[114556]Z : original file created at NASA GSFC |
| Format: | NetCDF4 |
| ProcessingLevel: | Level-3 |
| IdentifierProductDOIAuthority: | http://dx.doi.org/ |
| IdentifierProductDOI: | 10.5067/MEASURES/MODISCR/EQAR3H/DATA301 |
| Conventions: | CF-1.7 |
| source: | MODIS |
| MapProjection: | 110-km-Equal-Area |
| 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: | MYD06_L2,MOD06_L2 |
| InputDataProductVersion: | Collection 6.1 |
| GranuleID: | MODIS_CR.EqualArea_3h.C61.V1.0.L3.2014.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: | 2021-07-09T11:45:56Z |
| RangeBeginningDate: | 2013-12-31 |
| RangeBeginningTime: | 22:30:00 |
| RangeEndingDate: | 2014-12-31 |
| RangeEndingTime: | 22:29:59 |
| SouthernmostLatitude: | -90 |
| NorthernmostLatitude: | 90 |
| WesternmostLongitude: | -180 |
| EasternmostLongitude: | 180 |
| Description: | MODIS Cloud Regime (CR) 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: | MODIS Cloud Regime (CR) 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. |
| MODIS_Terra_CR: | Array of 32 bit Integers [time = 0..2919][cell = 0..41251] 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: cell time origname: MODIS_Terra_CR fullnamepath: /MODIS_Terra_CR |
| longitude: | Array of 32 bit Reals [cell = 0..41251] long_name: longitude _FillValue: -999.0000000 units: degrees_east valid_range: -180, 180 coordinates: cell comments: To avoid cell discontinuity, transform the coordinates from [-180, 180] to [0, 360]. See documentation for details. bounds: longitude_bounds origname: longitude fullnamepath: /longitude |
| longitude_bounds: | Array of 32 bit Reals [cell = 0..41251][edge = 0..1] long_name: longitude_bounds_of_cell valid_range: -180, 180 coordinates: edge cell comments: To avoid cell discontinuity, transform the coordinates from [-180, 180] to [0, 360]. See documentation for details. origname: longitude_bounds fullnamepath: /longitude_bounds |
| latitude: | Array of 32 bit Reals [cell = 0..41251] long_name: latitude _FillValue: -999.0000000 units: degrees_north valid_range: -90, 90 coordinates: cell bounds: latitude_bounds origname: latitude fullnamepath: /latitude |
| COT_bounds: | Array of 32 bit Reals [COT = 0..5][edge = 0..1] long_name: bounds_of_cloud_optical_thickness_bin valid_range: 0, 150 coordinates: edge COT origname: COT_bounds fullnamepath: /COT_bounds |
| latitude_bounds: | Array of 32 bit Reals [cell = 0..41251][edge = 0..1] long_name: latitude_bounds_of_cell valid_range: -90, 90 coordinates: edge cell origname: latitude_bounds fullnamepath: /latitude_bounds |
| centroids: | Array of 32 bit Reals [cr = 0..11][CTP = 0..6][COT = 0..5] 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: | Array of 32 bit Integers [time = 0..2919][cell = 0..41251] 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: cell time origname: MODIS_Aqua_CR fullnamepath: /MODIS_Aqua_CR |
| CTP_bounds: | Array of 32 bit Reals [CTP = 0..6][edge = 0..1] long_name: bounds_of_cloud_top_pressure_bin valid_range: 0, 1100 coordinates: edge CTP origname: CTP_bounds fullnamepath: /CTP_bounds |
| COT: | Array of 32 bit Reals [COT = 0..5] long_name: cloud optical thickness dimension units: 1 bounds: COT_bounds origname: COT fullnamepath: /COT |
| CTP: | Array of 32 bit Reals [CTP = 0..6] long_name: cloud top pressure dimension units: hPa bounds: CTP_bounds origname: CTP fullnamepath: /CTP |
| cell: | Array of 32 bit Reals [cell = 0..41251] long_name: index of cells units: 1 origname: cell fullnamepath: /cell |
| cr: | Array of 32 bit Integers [cr = 0..11] long_name: index of Cloud Regime units: 1 origname: cr fullnamepath: /cr |
| edge: | Array of 32 bit Reals [edge = 0..1] long_name: lower limit, upper limit units: 1 origname: edge fullnamepath: /edge |
| time: | Array of 32 bit Reals [time = 0..2919] 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 |