{"ob_id":31971,"uuid":"2365a1cd6e2d4bcb9312d36024e12d58","title":"Computation of Permafrost v2 datsets by the ESA Permafrost CCI","abstract":"The  Permafrost CCI project is  establishing Earth Observation (EO) based products for the permafrost Essential Climate Variable (ECV) spanning the last two decades. Since ground temperature  and  thaw  depth  cannot be  directly  observed  from  space-borne  sensors,  a  variety  of satellite  and  reanalysis  data  are  combined  in  a  ground  thermal  model.  The  algorithm  uses  remotely sensed  data  sets  of  Land  Surface  Temperature  (MODIS  LST/  ESA  LST  CCI)  and  landcover  (ESA LandcoverCCI)  to  drive  the  transient  permafrost  model  CryoGrid  2,  which  yields  thaw  depth  and ground  temperature  at  various  depths,  while  ground  temperature  forms  the  basis  for  permafrost fraction.\r\n\r\nInput data: MODIS Land surface temperature is used as the main input for the L4 production for 2003-2018 data. Sensors of auxiliary data are listed in the meta data.\r\nDownscaled and bias corrected ERA reanalyses data based on statistics of the overlap period between ERA reanalysis and MODIS LST are used for data before 2003. Sensors of auxiliary data are listed in the meta data.","keywords":"","inputDescription":17,"outputDescription":null,"softwareReference":null,"identifier_set":[]}