ข้อมูลทั้งหมดที่ NASA ผลิตขึ้นจากภารกิจ GRACE จะพร้อมให้ประชาชนใช้งานได้ฟรี
เมื่อใช้ข้อมูล GRCTellus โปรด
เพิ่มการรับทราบว่า "ข้อมูล GRACE land มีอยู่ที่
https://grace.jpl.nasa.gov
ซึ่งได้รับการสนับสนุนจากโปรแกรม MEaSUREs ของ NASA" และอ้างอิงโดยใช้
การอ้างอิงที่ระบุไว้
การอ้างอิง
การอ้างอิง:
ง. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins 2023
JPL GRACE และ GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water
Height CRI Filtered RL06.3Mv04 Ver. RL06.3Mv04. PO.DAAC, CA, USA. ชุดข้อมูล
เข้าถึง [YYYY-MM-DD] ที่
https://doi.org/10.5067/TEMSC-3JC634
Watkins, M. M., ง. N. Wiese, D.-N. Yuan, C. Boening และ F. W.
Landerer (2015), Improved methods for observing Earth's time variable mass,
mass distribution with GRACE using spherical cap mascons, J. Geophys. Res
Solid Earth, 120,
doi:10.1002/2014JB011547.
Wiese, D. N., ฉ. W. Landerer และ M. M. Watkins (2016),
Quantifying and reducing leakage errors in the JPL RL05M GRACE
mascon solution, Water Resour. Res., 52, 7490-7502,
doi:10.1002/2016WR019344
[null,null,[],[[["\u003cp\u003eThis dataset provides monthly global water storage and height anomalies, derived from GRACE and GRACE-FO and processed by NASA's JPL, using the Mascon approach (RL06.3Mv04) in equivalent water thickness units (cm).\u003c/p\u003e\n"],["\u003cp\u003eThe data, available from March 31, 2002, to September 30, 2024, consists of 4,551 independent estimates of surface mass change on a 3-degree grid, and it is provided in a single netCDF file for analysis of ocean, ice, and hydrology.\u003c/p\u003e\n"],["\u003cp\u003eThe Mascon grids in this dataset do not need to be de-correlated or smoothed, differing from traditional spherical harmonic gravity solutions, and do not correct for leakage errors across coastlines.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset includes two bands: \u003ccode\u003elwe_thickness\u003c/code\u003e which is equivalent liquid water thickness in cm and \u003ccode\u003euncertainty\u003c/code\u003e which represents the 1-sigma uncertainty, and are intended for expert users, with the suggestion for others to use the CRI-filtered Mascon dataset.\u003c/p\u003e\n"],["\u003cp\u003eAll NASA-produced data from this GRACE mission is freely available for public use, but should be cited properly when utilized, as outlined in the terms of use.\u003c/p\u003e\n"]]],[],null,["# GRACE Monthly Mass Grids Version 04 - Global Mascon (CRI Filtered)\n\nDataset Availability\n: 2002-03-31T00:00:00Z--2024-09-30T00:00:00Z\n\nDataset Provider\n:\n\n\n [NASA Jet Propulsion Laboratory](https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/)\n\nTags\n:\n[grace](/earth-engine/datasets/tags/grace) [gravity](/earth-engine/datasets/tags/gravity) [jpl](/earth-engine/datasets/tags/jpl) [mascon](/earth-engine/datasets/tags/mascon) [mass](/earth-engine/datasets/tags/mass) [nasa](/earth-engine/datasets/tags/nasa) [surface-ground-water](/earth-engine/datasets/tags/surface-ground-water) [tellus](/earth-engine/datasets/tags/tellus) [water](/earth-engine/datasets/tags/water) \n\n#### Description\n\nThis dataset contains gridded monthly global water storage/height anomalies\nrelative to a time-mean, derived from GRACE and GRACE-FO and processed at\nJPL using the Mascon approach (RL06.3Mv04). These data are provided in a\nsingle data file in netCDF format, and can be used for analysis for ocean,\nice, and hydrology phenomena. The water storage/height anomalies are given\nin equivalent water thickness units (cm). The solution provided here is\nderived from solving for monthly gravity field variations in terms of\ngeolocated spherical cap mass concentration functions, rather than global\nspherical harmonic coefficients. Additionally, realistic geophysical\ninformation is introduced during the solution inversion to intrinsically\nremove correlated error. Thus, these Mascon grids do not need to be\nde-correlated or smoothed, like traditional spherical harmonic gravity\nsolutions.\n\nThe complete Mascon solution consists of 4,551 relatively\nindependent estimates of surface mass change that have been derived using an\nequal-area 3-degree grid of individual mascons. It should be noted that this\ndataset does not correct for leakage errors across coastlines; it is\ntherefore recommended only for users who want to apply their own algorithm\nto separate between land and ocean mass very near coastlines.\n\nFor more information, please visit [GRACE page](https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/).\nFor a detailed description on the Mascon solution, including\nthe mathematical derivation, implementation of geophysical constraints, and\nsolution validation, please see [Watkins et al., 2015](https://doi.org/10.1002/2014JB011547).\nThis product is intended for expert use only; other users are encouraged to\nuse the [CRI-filtered Mascon dataset](https://podaac.jpl.nasa.gov/dataset/TELLUS_GRAC-GRFO_MASCON_CRI_GRID_RL06.3_V4).\n\nThis RL06.3Mv04 is an updated version of the previous [Tellus JPL Mascon\nRL06.1Mv03](https://doi.org/10.5067/TEMSC-3MJ63).\n\n### Bands\n\n\n**Pixel Size**\n\n55660 meters\n\n**Bands**\n\n| Name | Units | Pixel Size | Description |\n|-----------------|-------|------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `lwe_thickness` | cm | meters | Equivalent liquid water thickness in centimeters. |\n| `uncertainty` | | meters | 1-sigma uncertainty for each 3-degree mascon estimate. The provided estimates of uncertainty are regarded to be conservative. See the provider's [Error \\& Uncertainty Estimates section](https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/) |\n\n### Terms of Use\n\n**Terms of Use**\n\nAll NASA-produced data from the GRACE mission is made freely available\nfor the public to use. When using any of the GRCTellus data, please\nadd an acknowledgment: \"GRACE land are available at\n\u003chttps://grace.jpl.nasa.gov\u003e,\nsupported by the NASA MEaSUREs Program.\" and cite with the\ncitations provided.\n\n### Citations\n\nCitations:\n\n- D. N. Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. 2023.\n JPL GRACE and GRACE-FO Mascon Ocean, Ice, and Hydrology Equivalent Water\n Height CRI Filtered RL06.3Mv04. Ver. RL06.3Mv04. PO.DAAC, CA, USA. Dataset\n accessed \\[YYYY-MM-DD\\] at\n \u003chttps://doi.org/10.5067/TEMSC-3JC634\u003e.\n- Watkins, M. M., D. N. Wiese, D.-N. Yuan, C. Boening, and F. W.\n Landerer (2015), Improved methods for observing Earth's time variable mass,\n mass distribution with GRACE using spherical cap mascons, J. Geophys. Res\n Solid Earth, 120,\n [doi:10.1002/2014JB011547](https://doi.org/10.1002/2014JB011547).\n- Wiese, D. N., F. W. Landerer, and M. M. Watkins (2016),\n Quantifying and reducing leakage errors in the JPL RL05M GRACE\n mascon solution, Water Resour. Res., 52, 7490-7502,\n [doi:10.1002/2016WR019344](https://doi.org/10.1002/2016WR019344).\n\n### DOIs\n\n- \u003chttps://doi.org/10.1002/2014JB011547\u003e\n- \u003chttps://doi.org/10.1002/2016WR019344\u003e\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('NASA/GRACE/MASS_GRIDS_V04/MASCON_CRI')\n .filter(ee.Filter.date('2016-08-01', '2016-08-30'));\nvar equivalentWaterThickness = dataset.select('lwe_thickness');\nvar equivalentWaterThicknessVis = {\n min: -25.0,\n max: 25.0,\n palette: ['001137', '01abab', 'e7eb05', '620500'],\n};\nMap.setCenter(6.746, 46.529, 2);\nMap.addLayer(\n equivalentWaterThickness, equivalentWaterThicknessVis,\n 'Equivalent Water Thickness');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/NASA/NASA_GRACE_MASS_GRIDS_V04_MASCON_CRI) \n[GRACE Monthly Mass Grids Version 04 - Global Mascon (CRI Filtered)](/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_MASCON_CRI) \nThis dataset contains gridded monthly global water storage/height anomalies relative to a time-mean, derived from GRACE and GRACE-FO and processed at JPL using the Mascon approach (RL06.3Mv04). These data are provided in a single data file in netCDF format, and can be used for analysis for ocean, ice, and hydrology ... \nNASA/GRACE/MASS_GRIDS_V04/MASCON_CRI, grace,gravity,jpl,mascon,mass,nasa,surface-ground-water,tellus,water \n2002-03-31T00:00:00Z/2024-09-30T00:00:00Z \n-90 -180 90 180 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [https://doi.org/10.1002/2016WR019344](https://doi.org/https://grace.jpl.nasa.gov/data/get-data/jpl_global_mascons/)\n- [https://doi.org/10.1002/2016WR019344](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_MASCON_CRI)"]]
