// Descarga de datos climaticos historicos desde 1958
// http://www.gisandbeers.com/descarga-datos-climaticos-historicos-google-earth-engine/

// LLamamos a la coleccion de datos climaticos TerraClimate en GEE
var TerraClimate = ee.ImageCollection('IDAHO_EPSCOR/TERRACLIMATE')
  .filter(ee.Filter.date('2018-04-01', '2018-04-10')) // Identifica las mensualidades disponibles desde enero de 1958  
  .reduce(ee.Reducer.mean());
var TerraClimateAOI = TerraClimate.clip (geometry); // Delimita el poligono de zona AOI desde el visor de Engine

// Seleccion de variables climaticas provenientes de TerraClimate
var EvapotranspiracionReal = TerraClimateAOI.select('aet_mean').multiply (0.1);
var DeficitClimaticoAgua = TerraClimateAOI.select('def_mean').multiply (0.1);
var IndicePalmer = TerraClimateAOI.select('pdsi_mean').multiply (0.01);
var EvapotranspiracionPotencial = TerraClimateAOI.select('pet_mean').multiply (0.1);
var PrecipitacionAcumulada = TerraClimateAOI.select('pr_mean');
var Escorrentia  = TerraClimateAOI.select('ro_mean');
var HumedadSuelo = TerraClimateAOI.select('soil_mean').multiply (0.1);
var RadiacionSuperficie = TerraClimateAOI.select('srad_mean').multiply (0.1);
var AguaNieve = TerraClimateAOI.select('swe_mean');
var TemperaturaMaxima = TerraClimateAOI.select('tmmx_mean').multiply (0.1);
var TemperaturaMinima = TerraClimateAOI.select('tmmn_mean').multiply (0.1);
var PresionVapor = TerraClimateAOI.select('vap_mean').multiply (0.001);
var DeficitPresionVapor = TerraClimateAOI.select('vpd_mean').multiply (0.01);
var VelocidadViento = TerraClimateAOI.select('vs_mean').multiply (0.01);


// Representacion de las variables globales de TerraClimate
Map.addLayer (EvapotranspiracionReal, {max: 0.0, min: 314.0, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'EvapotranspiracionReal');
Map.addLayer (DeficitClimaticoAgua, {max: 0.0, min: 454.8, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'DeficitClimaticoAgua');
Map.addLayer (IndicePalmer, {max: -43.17, min: 34.18, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'IndicePalmer');  
Map.addLayer (EvapotranspiracionPotencial, {max: 0.0, min: 454.8, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'EvapotranspiracionPotencial');
Map.addLayer (PrecipitacionAcumulada, {max: 0.0, min: 7245.0, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'PrecipitacionAcumulada');
Map.addLayer (Escorrentia, {max: 0.0, min: 12560.0, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'Escorrentia');    
Map.addLayer (HumedadSuelo, {max: 0.0, min: 888.2, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'HumedadSuelo');
Map.addLayer (RadiacionSuperficie, {max: 0.0, min: 547.7, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'RadiacionSuperficie');
Map.addLayer (AguaNieve, {max: 0.0, min: 32767.0, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'AguaNieve');
Map.addLayer (TemperaturaMaxima, {max: -67.0, min: 57.6, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'TemperaturaMaxima');    
Map.addLayer (TemperaturaMinima, {max: -77.0, min: 38.7, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'TemperaturaMinima');    
Map.addLayer (PresionVapor, {max: 0.0, min: 14.749, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'PresionVapor');  
Map.addLayer (VelocidadViento, {max: 0.0, min: 29.23, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'VelocidadViento');    
Map.addLayer (DeficitPresionVapor, {max: 0.0, min: 11.13, palette: ['1a3678', '2955bc', '5699ff', '8dbae9', 'acd1ff', 'caebff', 'e5f9ff', 'fdffb4', 'ffe6a2', 'ffc969', 'ffa12d', 'ff7c1f', 'ca531a', 'ff0000', 'ab0000']},'DeficitPresionVapor');  

// Centramos la vista en tu zona AOI para visualizar las variables
Map.centerObject (TerraClimateAOI);


// Comenzamos la exportacion de las variables climaticas que se guardaran en el Drive de Google
Export.image.toDrive({image: EvapotranspiracionReal, description: 'EvapotranspiracionReal', scale: 4638 , region: geometry});
Export.image.toDrive({image: DeficitClimaticoAgua, description: 'DeficitClimaticoAgua', scale: 4638 , region: geometry});
Export.image.toDrive({image: IndicePalmer, description: 'IndicePalmer', scale: 4638 , region: geometry});
Export.image.toDrive({image: EvapotranspiracionPotencial, description: 'EvapotranspiracionPotencial', scale: 4638 , region: geometry});
Export.image.toDrive({image: PrecipitacionAcumulada, description: 'PrecipitacionAcumulada', scale: 4638 , region: geometry});
Export.image.toDrive({image: Escorrentia, description: 'Escorrentia', scale: 4638 , region: geometry});
Export.image.toDrive({image: HumedadSuelo, description: 'HumedadSuelo', scale: 4638 , region: geometry});
Export.image.toDrive({image: RadiacionSuperficie, description: 'RadiacionSuperficie', scale: 4638 , region: geometry});
Export.image.toDrive({image: AguaNieve, description: 'AguaNieve', scale: 4638 , region: geometry});
Export.image.toDrive({image: TemperaturaMaxima, description: 'TemperaturaMaxima', scale: 4638 , region: geometry});
Export.image.toDrive({image: TemperaturaMinima, description: 'TemperaturaMinima', scale: 4638 , region: geometry});
Export.image.toDrive({image: PresionVapor, description: 'PresionVapor', scale: 4638 , region: geometry});
Export.image.toDrive({image: VelocidadViento, description: 'VelocidadViento', scale: 4638 , region: geometry});
Export.image.toDrive({image: DeficitPresionVapor, description: 'DeficitPresionVapor', scale: 4638 , region: geometry});