This README.txt file was generated on 2025-5-1 by Edward Bair GENERAL INFORMATION 1. Title of Dataset: SPIReS-MODIS-ParBal Snow Water Equivalent Reconstruction: Western USA, water years 2001-2024 2. Author Information A. Principal Investigator Contact Information Name: Edward Bair Institution: Earth Research Institute, University of California, Santa Barbara Address: 6832 Ellison Hall University of California Santa Barbara, CA 93106-3060 Email: nbair@eri.ucsb.edu 3. Date of data collection (single date, range, approximate date) : 2000-10-1 through 2024-9-30 4. Geographic location of data collection : Western USA 5. Information about funding sources that supported the collection of the data: Bair, E. H., J. Dozier, K. Rittger, T. Stillinger, W. Kleiber, and R. E. Davis (2023), How do tradeoffs in satellite spatial and temporal resolution impact snow water equivalent reconstruction?, The Cryosphere, 17, 2629–2643, doi: 10.5194/tc-17-2629-2023. 6. 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Links to publications that cite or use the data: Bair, E. H., J. Dozier, K. Rittger, T. Stillinger, W. Kleiber, and R. E. Davis (2023), How do tradeoffs in satellite spatial and temporal resolution impact snow water equivalent reconstruction?, The Cryosphere, 17, 2629–2643, doi: 10.5194/tc-17-2629-2023. 11. Links to other publicly accessible locations of the data: 12. Links/relationships to ancillary data sets: 13. Was data derived from another source? yes A. If yes, list source(s): Bair, E.H., Stillinger, T., and Dozier, J. (2021) Snow Property Inversion from Remote Sensing (SPIReS), IEEE Transactions on Remote Sensing and Geoscience, doi: 10.1109/TGRS.2020.3040328 14. Recommended citation for this dataset: Bair, E.H., SPIReS-MODIS-ParBal Snow Water Equivalent Reconstruction: Western USA, water years 2001-2024 , doi: [tbd], [date accessed] DATA & FILE OVERVIEW 1. File List: 2. Relationship between files, if important: 3. Additional related data collected that was not included in the current data package: 4. Are there multiple versions of the dataset? no A. If yes, name of file(s) that was updated: i. Why was the file updated? ii. When was the file updated? METHODOLOGICAL INFORMATION 1. Description of methods used for collection/generation of data: Bair, E. H., J. Dozier, K. Rittger, T. Stillinger, W. Kleiber, and R. E. Davis (2023), How do tradeoffs in satellite spatial and temporal resolution impact snow water equivalent reconstruction?, The Cryosphere, 17, 2629–2643, doi: 10.5194/tc-17-2629-2023. 2. Methods for processing the data: https://github.com/edwardbair/ParBal 3. Instrument- or software-specific information needed to interpret the data: 4. Standards and calibration information, if appropriate: 5. Environmental/experimental conditions: 6. Describe any quality-assurance procedures performed on the data: 7. People involved with sample collection, processing, analysis and/or submission: DATA-SPECIFIC INFORMATION FOR: 2021.h5 (example water year) 1. Number of variables: 4 2. Number of cases/rows: 4500x4500x365 3. Variable List: The projection is the Western USA Albers with 500 m pixels. The 5 sinusodial tiles are available on demand. The h5 files can be read with several software packages. We use MATLAB. The /Grid/ReferencingMatrix can be used to create the x and y grid as: [x y] = [row col 1] * R where * is matrix multiplication and R(1,1) - rows 1st, columns 2nd - is the upper left corner pixel x coordinate, R(2,1) is the upper left corner pixel y coordinate The projection information is provided as a CRSstring The h5 files contain: MATLAB matdates, geographic information, spacetime cubes of max swe dates (maxawedates - empty array of ones), daily snow melt (melt, mm), daily reconstructed SWE (swe, mm), daily hybrid SWE which uses scaled GLDAS SWE for the acc. season (sweHybrid, mm). The spacetime cubes are each one day, begin on 10-1 and end on 9-30. For example, in MATLAB, this shows the structure of the WY 2021 h5 file. >> h5disp('mosaicreconstruction_2001.h5') HDF5 mosaicreconstruction_2001.h5 Group '/' Attributes: 'MATLABdates': 730760.000000 730761.000000 730762.000000 730763.000000 730764.000000 730765.000000 730766.000000 730767.000000 730768.000000 730769.000000 730770.000000 730771.000000 730772.000000 730773.000000 730774.000000 730775.000000 730776.000000 730777.000000 730778.000000 730779.000000 730780.000000 730781.000000 730782.000000 730783.000000 730784.000000 730785.000000 730786.000000 730787.000000 730788.000000 730789.000000 730790.000000 730791.000000 730792.000000 730793.000000 730794.000000 730795.000000 730796.000000 730797.000000 730798.000000 730799.000000 730800.000000 730801.000000 730802.000000 730803.000000 730804.000000 730805.000000 730806.000000 730807.000000 730808.000000 730809.000000 730810.000000 730811.000000 730812.000000 730813.000000 730814.000000 730815.000000 730816.000000 730817.000000 730818.000000 730819.000000 730820.000000 730821.000000 730822.000000 730823.000000 730824.000000 730825.000000 730826.000000 730827.000000 730828.000000 730829.000000 730830.000000 730831.000000 730832.000000 730833.000000 730834.000000 730835.000000 730836.000000 730837.000000 730838.000000 730839.000000 730840.000000 730841.000000 730842.000000 730843.000000 730844.000000 730845.000000 730846.000000 730847.000000 730848.000000 730849.000000 730850.000000 730851.000000 730852.000000 730853.000000 730854.000000 730855.000000 730856.000000 730857.000000 730858.000000 730859.000000 730860.000000 730861.000000 730862.000000 730863.000000 730864.000000 730865.000000 730866.000000 730867.000000 730868.000000 730869.000000 730870.000000 730871.000000 730872.000000 730873.000000 730874.000000 730875.000000 730876.000000 730877.000000 730878.000000 730879.000000 730880.000000 730881.000000 730882.000000 730883.000000 730884.000000 730885.000000 730886.000000 730887.000000 730888.000000 730889.000000 730890.000000 730891.000000 730892.000000 730893.000000 730894.000000 730895.000000 730896.000000 730897.000000 730898.000000 730899.000000 730900.000000 730901.000000 730902.000000 730903.000000 730904.000000 730905.000000 730906.000000 730907.000000 730908.000000 730909.000000 730910.000000 730911.000000 730912.000000 730913.000000 730914.000000 730915.000000 730916.000000 730917.000000 730918.000000 730919.000000 730920.000000 730921.000000 730922.000000 730923.000000 730924.000000 730925.000000 730926.000000 730927.000000 730928.000000 730929.000000 730930.000000 730931.000000 730932.000000 730933.000000 730934.000000 730935.000000 730936.000000 730937.000000 730938.000000 730939.000000 730940.000000 730941.000000 730942.000000 730943.000000 730944.000000 730945.000000 730946.000000 730947.000000 730948.000000 730949.000000 730950.000000 730951.000000 730952.000000 730953.000000 730954.000000 730955.000000 730956.000000 730957.000000 730958.000000 730959.000000 730960.000000 730961.000000 730962.000000 730963.000000 730964.000000 730965.000000 730966.000000 730967.000000 730968.000000 730969.000000 730970.000000 730971.000000 730972.000000 730973.000000 730974.000000 730975.000000 730976.000000 730977.000000 730978.000000 730979.000000 730980.000000 730981.000000 730982.000000 730983.000000 730984.000000 730985.000000 730986.000000 730987.000000 730988.000000 730989.000000 730990.000000 730991.000000 730992.000000 730993.000000 730994.000000 730995.000000 730996.000000 730997.000000 730998.000000 730999.000000 731000.000000 731001.000000 731002.000000 731003.000000 731004.000000 731005.000000 731006.000000 731007.000000 731008.000000 731009.000000 731010.000000 731011.000000 731012.000000 731013.000000 731014.000000 731015.000000 731016.000000 731017.000000 731018.000000 731019.000000 731020.000000 731021.000000 731022.000000 731023.000000 731024.000000 731025.000000 731026.000000 731027.000000 731028.000000 731029.000000 731030.000000 731031.000000 731032.000000 731033.000000 731034.000000 731035.000000 731036.000000 731037.000000 731038.000000 731039.000000 731040.000000 731041.000000 731042.000000 731043.000000 731044.000000 731045.000000 731046.000000 731047.000000 731048.000000 731049.000000 731050.000000 731051.000000 731052.000000 731053.000000 731054.000000 731055.000000 731056.000000 731057.000000 731058.000000 731059.000000 731060.000000 731061.000000 731062.000000 731063.000000 731064.000000 731065.000000 731066.000000 731067.000000 731068.000000 731069.000000 731070.000000 731071.000000 731072.000000 731073.000000 731074.000000 731075.000000 731076.000000 731077.000000 731078.000000 731079.000000 731080.000000 731081.000000 731082.000000 731083.000000 731084.000000 731085.000000 731086.000000 731087.000000 731088.000000 731089.000000 731090.000000 731091.000000 731092.000000 731093.000000 731094.000000 731095.000000 731096.000000 731097.000000 731098.000000 731099.000000 731100.000000 731101.000000 731102.000000 731103.000000 731104.000000 731105.000000 731106.000000 731107.000000 731108.000000 731109.000000 731110.000000 731111.000000 731112.000000 731113.000000 731114.000000 731115.000000 731116.000000 731117.000000 731118.000000 731119.000000 731120.000000 731121.000000 731122.000000 731123.000000 731124.000000 'ISOdates': '20001001 20001002 20001003 20001004 20001005 20001006 20001007 20001008 20001009 20001010 20001011 20001012 20001013 20001014 20001015 20001016 20001017 20001018 20001019 20001020 20001021 20001022 20001023 20001024 20001025 20001026 20001027 20001028 20001029 20001030 20001031 20001101 20001102 20001103 20001104 20001105 20001106 20001107 20001108 20001109 20001110 20001111 20001112 20001113 20001114 20001115 20001116 20001117 20001118 20001119 20001120 20001121 20001122 20001123 20001124 20001125 20001126 20001127 20001128 20001129 20001130 20001201 20001202 20001203 20001204 20001205 20001206 20001207 20001208 20001209 20001210 20001211 20001212 20001213 20001214 20001215 20001216 20001217 20001218 20001219 20001220 20001221 20001222 20001223 20001224 20001225 20001226 20001227 20001228 20001229 20001230 20001231 20010101 20010102 20010103 20010104 20010105 20010106 20010107 20010108 20010109 20010110 20010111 20010112 20010113 20010114 20010115 20010116 20010117 20010118 20010119 20010120 20010121 20010122 20010123 20010124 20010125 20010126 20010127 20010128 20010129 20010130 20010131 20010201 20010202 20010203 20010204 20010205 20010206 20010207 20010208 20010209 20010210 20010211 20010212 20010213 20010214 20010215 20010216 20010217 20010218 20010219 20010220 20010221 20010222 20010223 20010224 20010225 20010226 20010227 20010228 20010301 20010302 20010303 20010304 20010305 20010306 20010307 20010308 20010309 20010310 20010311 20010312 20010313 20010314 20010315 20010316 20010317 20010318 20010319 20010320 20010321 20010322 20010323 20010324 20010325 20010326 20010327 20010328 20010329 20010330 20010331 20010401 20010402 20010403 20010404 20010405 20010406 20010407 20010408 20010409 20010410 20010411 20010412 20010413 20010414 20010415 20010416 20010417 20010418 20010419 20010420 20010421 20010422 20010423 20010424 20010425 20010426 20010427 20010428 20010429 20010430 20010501 20010502 20010503 20010504 20010505 20010506 20010507 20010508 20010509 20010510 20010511 20010512 20010513 20010514 20010515 20010516 20010517 20010518 20010519 20010520 20010521 20010522 20010523 20010524 20010525 20010526 20010527 20010528 20010529 20010530 20010531 20010601 20010602 20010603 20010604 20010605 20010606 20010607 20010608 20010609 20010610 20010611 20010612 20010613 20010614 20010615 20010616 20010617 20010618 20010619 20010620 20010621 20010622 20010623 20010624 20010625 20010626 20010627 20010628 20010629 20010630 20010701 20010702 20010703 20010704 20010705 20010706 20010707 20010708 20010709 20010710 20010711 20010712 20010713 20010714 20010715 20010716 20010717 20010718 20010719 20010720 20010721 20010722 20010723 20010724 20010725 20010726 20010727 20010728 20010729 20010730 20010731 20010801 20010802 20010803 20010804 20010805 20010806 20010807 20010808 20010809 20010810 20010811 20010812 20010813 20010814 20010815 20010816 20010817 20010818 20010819 20010820 20010821 20010822 20010823 20010824 20010825 20010826 20010827 20010828 20010829 20010830 20010831 20010901 20010902 20010903 20010904 20010905 20010906 20010907 20010908 20010909 20010910 20010911 20010912 20010913 20010914 20010915 20010916 20010917 20010918 20010919 20010920 20010921 20010922 20010923 20010924 20010925 20010926 20010927 20010928 20010929 20010930' Group '/Grid' Attributes: 'mapprojection': 'eqaconicstd' 'angleunits': 'degrees' 'aspect': 'normal' 'falsenorthing': 0.000000 'falseeasting': 0.000000 'geoid': 6378137.000000 0.081819 'mapparallels': 29.500000 45.500000 'nparallels': 2.000000 'origin': 37.500000 -113.000000 0.000000 'scalefactor': 1.000000 'trimlat': -90.000000 90.000000 'trimlon': -135.000000 135.000000 'CRSstring': 'PROJCRS["USA_Contiguous_Albers_Equal_Area_Conic",BASEGEOGCRS["NAD83",DATUM["North American Datum 1983",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["Degree",0.0174532925199433]]],CONVERSION["USA_Contiguous_Albers_Equal_Area_Conic",METHOD["Albers Equal Area",ID["EPSG",9822]],PARAMETER["Latitude of false origin",37.5,ANGLEUNIT["Degree",0.0174532925199433],ID["EPSG",8821]],PARAMETER["Longitude of false origin",-113,ANGLEUNIT["Degree",0.0174532925199433],ID["EPSG",8822]],PARAMETER["Latitude of 1st standard parallel",29.5,ANGLEUNIT["Degree",0.0174532925199433],ID["EPSG",8823]],PARAMETER["Latitude of 2nd standard parallel",45.5,ANGLEUNIT["Degree",0.0174532925199433],ID["EPSG",8824]],PARAMETER["Easting at false origin",0,LENGTHUNIT["metre",1],ID["EPSG",8826]],PARAMETER["Northing at false origin",0,LENGTHUNIT["metre",1],ID["EPSG",8827]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Not known."],AREA["United States (USA) - CONUS onshore - Alabama; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming."],BBOX[24.41,-124.79,49.38,-66.91]],ID["ESRI",102003]]' 'ReferencingMatrix': 3x2 H5T_FLOAT Dataset 'maxswedates' Size: 4500x4500 MaxSize: 4500x4500 Datatype: H5T_STD_U16LE (uint16) ChunkSize: 4500x4500 Filters: deflate(9) FillValue: 0 Dataset 'melt' Size: 4500x4500x365 MaxSize: 4500x4500x365 Datatype: H5T_STD_U16LE (uint16) ChunkSize: 4500x4500x1 Filters: deflate(9) FillValue: 65535 Attributes: 'units': 'mm' Dataset 'swe' Size: 4500x4500x365 MaxSize: 4500x4500x365 Datatype: H5T_STD_U16LE (uint16) ChunkSize: 4500x4500x1 Filters: deflate(9) FillValue: 65535 Attributes: 'units': 'mm' Dataset 'sweHybrid' Size: 4500x4500x365 MaxSize: 4500x4500x365 Datatype: H5T_STD_U16LE (uint16) ChunkSize: 4500x4500x1 Filters: deflate(9) FillValue: 65535 Attributes: 'units': 'mm' To read all the hybrid SWE values for 2021 use: sweHybrid=h5read('mosaicreconstruction2001.h5','/Grid/sweHybrid'); 4. Missing data codes: NaN 5. Specialized formats or other abbreviations used: https://www.hdfgroup.org/solutions/hdf5/