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Chlorophylla_conc_GEE.js
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Chlorophylla_conc_GEE.js
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/*
Title: Calculate Chlorophyll-a Concentration in GEE and Export Chlorphyll-a mean images
Author: Shahriar Rahman
Email: shahriar.env12@gmail.com
Acknowledgements: Google Earth Engine
*/
//Chlorophyll-a image data from 1 Jan - 31 De 2020 from Global Change Observation Mission (GCOM)
//JAXA
/* Data CitatioN: Murakami, H. (Jan. 2020). ATBD of GCOM-C chlorophyll-a
concentration algorithm (Version 2). Retrieved from
https://suzaku.eorc.jaxa.jp/GCOM_C/data/ATBD/ver2/V2ATBD_O3AB_Chla_Murakami.pdf
*/
var GCOM_Img = ee.ImageCollection("JAXA/GCOM-C/L3/OCEAN/CHLA/V2")
.filterDate('2020-01-01', '2020-12-31');
var GCOM = GCOM_Img.mean().multiply(0.0016).log10();
var geometry = AusOcean.geometry();
var GCOM_clp = GCOM.clip(geometry);
//Chart titles
var title = {
title: 'Chlorophyll-a Concentration',
hAxis: {title: 'Time'},
vAxis: {title: 'mg/m^3'},
};
//Bar chart with CHLA (Chlorophyll-A) & CHLA_QA Flag
var chart = ui.Chart.image.series
(GCOM_Img,geometry, ee.Reducer.mean(), 4639,'system:time_start')
.setOptions(title)
.setChartType('ColumnChart');
print('Chlorophyll-a Concentration from 1 Jan - 31 Dec 2020');
print(chart);
//Export mean Chlorophyll-a (two bands)images to GoogleDrive
Export.image.toDrive({
image: GCOM_clp,
description: 'GCOM_ChlorA',
region: geometry,
scale: 4639,
crs:'epsg:4326',
maxPixels:4e10,
});
//End of script.
//Thank you for watching.
//Please subscribe to my youtube channel.