이 데이터 세트에는 GRACE 및 GRACE-FO에서 파생되고 Mascon 접근 방식 (RL06.3Mv04)을 사용하여 JPL에서 처리된 시간 평균과 관련된 격자화된 월별 전 세계 물 저장/높이 이상치가 포함되어 있습니다. 이러한 데이터는 netCDF 형식의 단일 데이터 파일로 제공되며 해양, 빙하, 수문학 현상 분석에 사용할 수 있습니다. 물 저장/높이 이상치는 등가 물 두께 단위 (cm)로 표시됩니다. 여기에 제공된 솔루션은 전역 구면 조화 함수 계수가 아닌 지리적 위치가 지정된 구면 캡 질량 농도 함수 측면에서 월별 중력장 변동을 해결하는 데서 파생됩니다. 또한 솔루션 반전 중에 현실적인 지구물리학 정보가 도입되어 상관 오류를 본질적으로 제거합니다. 따라서 이러한 Mascon 그리드는 기존 구면 조화 함수 중력 솔루션과 같이 상관관계를 제거하거나 평활화할 필요가 없습니다.
완전한 Mascon 솔루션은 개별 마스콘의 등면적 3도 그리드를 사용하여 도출된 표면 질량 변화에 관한 4,551개의 비교적 독립적인 추정치로 구성됩니다. 이 데이터 세트는 해안선을 따라 누출 오류를 수정하지 않으므로 해안선에 매우 가까운 육지와 해양을 구분하는 자체 알고리즘을 적용하려는 사용자에게만 권장됩니다.
각 3도 마스콘 추정치의 1시그마 불확실성입니다.
제공된 불확실성 추정치는 보수적인 것으로 간주됩니다.
제공업체의 오차 및 불확실성 추정치 섹션을 참고하세요.
이용약관
이용약관
GRACE 미션에서 NASA가 생성한 모든 데이터는 대중이 사용할 수 있도록 무료로 제공됩니다. GRCTellus 데이터를 사용하는 경우 'GRACE 육지는 https://grace.jpl.nasa.gov에서 제공되며 NASA MEaSUREs 프로그램에서 지원합니다.'라는 확인 메시지를 추가하고 제공된 인용으로 인용하세요.
인용
인용:
D. 북 Wiese, D.-N. Yuan, C. Boening, F. W. Landerer, M. M. Watkins. 2023.
JPL GRACE 및 GRACE-FO Mascon 해양, 빙하, 수문학 등가 수위 JPL RL06.3Mv04. 버전 RL06.3Mv04 PO.DAAC, CA, USA. 데이터 세트는 https://doi.org/10.5067/TEMSC-3MJ634에서 [YYYY-MM-DD] 에 액세스했습니다.
Watkins, M. M., D. 북 Wiese, D.-N. Yuan, C. 보에닝, 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., F. W. Landerer, 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.
이 데이터 세트에는 GRACE 및 GRACE-FO에서 파생되고 Mascon 접근 방식 (RL06.3Mv04)을 사용하여 JPL에서 처리된 시간 평균과 관련된 격자화된 월별 전 세계 물 저장/높이 이상치가 포함되어 있습니다. 이 데이터는 netCDF 형식의 단일 데이터 파일로 제공되며 해양, 빙하, 수문학 분석에 사용할 수 있습니다.
[null,null,[],[[["\u003cp\u003eThis dataset offers monthly global water storage and height anomalies, derived from GRACE and GRACE-FO and processed by NASA's JPL, utilizing the Mascon approach (RL06.3Mv04) between the dates of 2002-03-31T00:00:00Z and 2024-09-30T00:00:00Z.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset provides water storage and height anomalies in equivalent water thickness units (cm) and includes uncertainty measurements, with the data being useful for analyzing ocean, ice, and hydrological phenomena, and is presented in a single netCDF formatted file.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset consists of 4,551 independent estimates of surface mass change on an equal-area 3-degree grid, and it is important to note that this dataset does not correct for leakage errors across coastlines, so custom algorithms are recommended for users needing to differentiate land and ocean mass near coastlines.\u003c/p\u003e\n"],["\u003cp\u003eThe data is accessible via Google Earth Engine using the code snippet \u003ccode\u003eee.ImageCollection("NASA/GRACE/MASS_GRIDS_V04/MASCON")\u003c/code\u003e and is available for free public use, with the requirement to acknowledge the GRACE mission and cite the provided publications when utilized.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset is an updated version of the prior Tellus JPL Mascon RL06.1Mv03, and is intended for expert use, however there is a link provided for less advanced users to navigate toward a more suitable dataset.\u003c/p\u003e\n"]]],[],null,["# GRACE Monthly Mass Grids Release 6.3 Version 4 - Global Mascons\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 JPL RL06.3Mv04. Ver. RL06.3Mv04. PO.DAAC, CA, USA. Dataset accessed\n \\[YYYY-MM-DD\\] at\n \u003chttps://doi.org/10.5067/TEMSC-3MJ634\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')\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) \n[GRACE Monthly Mass Grids Release 6.3 Version 4 - Global Mascons](/earth-engine/datasets/catalog/NASA_GRACE_MASS_GRIDS_V04_MASCON) \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, 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)"]]
