The modeled data in these archives are in the NetCDF format (https://www.unidata.ucar.edu/software/netcdf/). NetCDF (Network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. It is also a community standard for sharing scientific data. The Unidata Program Center supports and maintains netCDF programming interfaces for C, C++, Java, and Fortran. Programming interfaces are also available for Python, IDL, MATLAB, R, Ruby, and Perl. Data in netCDF format is: • Self-Describing. A netCDF file includes information about the data it contains. • Portable. A netCDF file can be accessed by computers with different ways of storing integers, characters, and floating-point numbers. • Scalable. Small subsets of large datasets in various formats may be accessed efficiently through netCDF interfaces, even from remote servers. • Appendable. Data may be appended to a properly structured netCDF file without copying the dataset or redefining its structure. • Sharable. One writer and multiple readers may simultaneously access the same netCDF file. • Archivable. Access to all earlier forms of netCDF data will be supported by current and future versions of the software. Pub_figures.tar.zip Contains the NCL scripts for figures 1-5 and Chesapeake Bay Airshed shapefile. The directory structure of the archive is ./Pub_figures/Fig#_data. Where # is the figure number from 1-5. EMISS.data.tar.zip This archive contains two NetCDF files that contain the emission totals for 2011ec and 2040ei emission inventories. The name of the files contain the year of the inventory and the file header contains a description of each variable and the variable units. EPIC.data.tar.zip contains the monthly mean EPIC data in NetCDF format for ammonium fertilizer application (files with ANH3 in the name) and soil ammonium concentration (files with NH3 in the name) for historical (Hist directory) and future (RCP-4.5 directory) simulations. WRF.data.tar.zip contains mean monthly and seasonal data from the 36km downscaled WRF simulations in the NetCDF format for the historical (Hist directory) and future (RCP-4.5 directory) simulations. CMAQ.data.tar.zip contains the mean monthly and seasonal data in NetCDF format from the 36km CMAQ simulations for the historical (Hist directory), future (RCP-4.5 directory) and future with historical emissions (RCP-4.5-hist-emiss directory).

This dataset is associated with the following publication: Campbell, P., J. Bash, C. Nolte, T. Spero, E. Cooter, K. Hinson, and L. Linker. Projections of Atmospheric Nitrogen Deposition to the Chesapeake Bay Watershed. Journal of Geophysical Research - Biogeosciences. American Geophysical Union, Washington, DC, USA, 12(11): 3307-3326, (2019).

Surface ocean velocities estimated from HF-Radar are representative of the upper 0.3 - 2.5 meters of the ocean. The main objective of near-real time processing is to produce the best product from available data at the time of processing. Radial velocity measurements are obtained from individual radar sites through the U.S. HF-Radar Network. Hourly radial data are processed by unweighted least-squares on a 6 km resolution grid of the U.S. West Coast to produce near real-time surface current maps. cdm_data_type=Grid Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 Easternmost_Easting=-116.9924 format_version=HFRNet_1.0.0 geospatial_lat_max=38.01736 geospatial_lat_min=30.25 geospatial_lat_resolution=0.053939999999999974 geospatial_lat_units=degrees_north geospatial_lon_max=-116.9924 geospatial_lon_min=-127.9863 geospatial_lon_resolution=0.06246534090909089 geospatial_lon_units=degrees_east grid_projection=equidistant cylindrical grid_resolution=6km History=Translated to CF-1.0 Conventions by Netcdf-Java CDM (NetcdfCFWriter) Original Dataset = fmrc:HFRADAR,_US_West_Coast,_6km_Resolution,_Hourly_RTV; Translation Date = Wed Jan 10 14:00:09 GMT 2018 history=05-Jan-2018 22:35:21: NetCDF file created 05-Jan-2018 22:35:21: Filtered U and V by GDOP < 1.25 ; FMRC Best Dataset infoUrl=https://cordc.ucsd.edu/projects/mapping/ institution=Scripps keywords_vocabulary=GCMD Science Keywords location=Proto fmrc:HFRADAR,_US_West_Coast,_6km_Resolution,_Hourly_RTV Metadata_Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 netcdf_library_version=4.1.3 Northernmost_Northing=38.01736 original_institution=Scripps Institution of Oceanography references=Terrill, E. et al., 2006. Data Management and Real-time Distribution in the HF-Radar National Network. Proceedings of the MTS/IEEE Oceans 2006 Conference, Boston MA, September 2006. regional_description=Unites States, West Coast source=Surface Ocean HF-Radar sourceUrl=(local files) Southernmost_Northing=30.25 standard_name_vocabulary=CF-12 time_coverage_end=2018-01-10T12:00:00Z time_coverage_start=2014-09-16T00:00:00Z Westernmost_Easting=-127.9863

NOAA CoastWatch provides SST data from NASA's Aqua Spacecraft. Measurements are gathered by the Moderate Resolution Imaging Spectroradiometer (MODIS) carried aboard the spacecraft. acknowledgement=NOAA NESDIS COASTWATCH, NOAA SWFSC ERD cdm_data_type=Grid cols=4001 composite=true contributor_name=NASA GSFC (OBPG) contributor_role=Source of level 2 data. Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 cwhdf_version=3.4 Easternmost_Easting=243.0 et_affine=0.0 files=AQUA_MODIS.20220520T125501.L2.SST.NRT.nc, AQUA_MODIS.20220520T130001.L2.SST.NRT.nc, AQUA_MODIS.20220520T130500.L2.SST.NRT.nc, AQUA_MODIS.20220520T193501.L2.SST.NRT.nc, AQUA_MODIS.20220520T194001.L2.SST.NRT.nc, AQUA_MODIS.20220520T211001.L2.SST.NRT.nc, AQUA_MODIS.20220520T211501.L2.SST.NRT.nc, AQUA_MODIS.20220520T212001.L2.SST.NRT.nc, AQUA_MODIS.20220520T225001.L2.SST.NRT.nc, AQUA_MODIS.20220520T225501.L2.SST.NRT.nc, AQUA_MODIS.20220520T230001.L2.SST.NRT.nc gctp_datum=12 gctp_parm=0.0 gctp_sys=0 gctp_zone=0 geospatial_lat_max=38.0 geospatial_lat_min=30.0 geospatial_lat_resolution=0.0125 geospatial_lat_units=degrees_north geospatial_lon_max=243.0 geospatial_lon_min=235.0 geospatial_lon_resolution=0.0125 geospatial_lon_units=degrees_east geospatial_vertical_max=0.0 geospatial_vertical_min=0.0 geospatial_vertical_positive=up geospatial_vertical_units=m History=Translated to CF-1.0 Conventions by Netcdf-Java CDM (CFGridWriter2) Original Dataset = satellite/MW/sstd/1day; Translation Date = 2022-05-23T21:30:14.139Z infoUrl=https://coastwatch.pfeg.noaa.gov institution=NOAA CoastWatch WCN keywords_vocabulary=GCMD Science Keywords Metadata_Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 naming_authority=gov.noaa.pfeg.coastwatch Northernmost_Northing=38.0 origin=NASA GSFC (OBPG) original_institution=NOAA CoastWatch, West Coast Node polygon_latitude=22.0 polygon_longitude=205.0 processing_level=3 project=CoastWatch (https://coastwatch.noaa.gov/) projection=geographic projection_type=mapped references=Aqua/MODIS information: https://oceancolor.gsfc.nasa.gov/ . MODIS information: https://coastwatch.noaa.gov/modis_ocolor_overview.html . rows=2321 satellite=Aqua sensor=MODIS source=satellite observation: Aqua, MODIS sourceUrl=(local files) Southernmost_Northing=30.0 standard_name_vocabulary=CF-1.0 start_time=0.0 time_coverage_end=2022-05-21T12:00:00Z time_coverage_start=2021-10-12T12:00:00Z Westernmost_Easting=235.0

MODIS measures chlorophyll fluorescence, which gives insight into the physiology of phytoplankton in the ocean. When phytoplankton are under stress, the rate at which the fluoresce can be decoupled from the rate of photosynthetic productivity. acknowledgement=NOAA NESDIS COASTWATCH, NOAA SWFSC ERD cdm_data_type=Grid cols=4001 composite=true contributor_name=NASA, NASA GSFC OBPG contributor_role=Source of level 2 data. Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 cwhdf_version=3.4 Easternmost_Easting=243.0 et_affine=0.0 files=A2021010104000.L2_LAC_OC.nc, A2021010121500.L2_LAC_OC.nc, A2021010134500.L2_LAC_OC.nc, A2021010135000.L2_LAC_OC.nc, A2021010135500.L2_LAC_OC.nc, A2021010185000.L2_LAC_OC.nc, A2021010185500.L2_LAC_OC.nc, A2021010202000.L2_LAC_OC.nc, A2021010202500.L2_LAC_OC.nc, A2021010203000.L2_LAC_OC.nc, A2021010220000.L2_LAC_OC.nc, A2021010220500.L2_LAC_OC.nc, A2021010221000.L2_LAC_OC.nc, A2021010234000.L2_LAC_OC.nc, A2021010234500.L2_LAC_OC.nc, A2021010235000.L2_LAC_OC.nc gctp_datum=12 gctp_parm=0.0 gctp_sys=0 gctp_zone=0 geospatial_lat_max=38.0 geospatial_lat_min=30.0 geospatial_lat_resolution=0.0125 geospatial_lat_units=degrees_north geospatial_lon_max=243.0 geospatial_lon_min=232.0 geospatial_lon_resolution=0.0125 geospatial_lon_units=degrees_east geospatial_vertical_max=0.0 geospatial_vertical_min=0.0 geospatial_vertical_positive=up geospatial_vertical_units=m History=Translated to CF-1.0 Conventions by Netcdf-Java CDM (CFGridWriter2) Original Dataset = satellite/MW/cflh/1day; Translation Date = 2021-01-13T22:17:14.610Z infoUrl=https://coastwatch.pfeg.noaa.gov institution=NOAA CoastWatch WCN keywords_vocabulary=GCMD Science Keywords Metadata_Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 naming_authority=gov.noaa.pfeg.coastwatch Northernmost_Northing=38.0 origin=NASA, NASA GSFC OBPG original_institution=NOAA CoastWatch, West Coast Node polygon_latitude=22.0 polygon_longitude=205.0 processing_level=3 project=CoastWatch (https://coastwatch.noaa.gov/) projection=geographic projection_type=mapped references=Aqua MODIS satellites information: https://oceancolor.gsfc.nasa.gov/data/aqua/ Processing information: http://neptune.gsfc.nasa.gov/publications/pdf/pubs2003/Hoge_Validation_Terra_MODIS.pdf rows=2321 satellite=Aqua sensor=MODIS source=satellite observation: Aqua, MODIS sourceUrl=(local files) Southernmost_Northing=30.0 standard_name_vocabulary=CF-1.0 start_time=0.0 time_coverage_end=2021-01-11T12:00:00Z time_coverage_start=2017-04-24T12:00:00Z Westernmost_Easting=232.0

NOAA CoastWatch distributes chlorophyll-a concentration data from NASA's Aqua Spacecraft. Measurements are gathered by the Moderate Resolution Imaging Spectroradiometer (MODIS) carried aboard the spacecraft. The algorithm currently used in processing the water leaving radiance to chlorophyll concentration has not yet been accepted as science quality. In addition, assumptions are made in the atmospheric correction in order to provide the data in a timely manner. acknowledgement=NOAA NESDIS COASTWATCH, NOAA SWFSC ERD cdm_data_type=Grid cols=4001 composite=true contributor_name=NASA GSFC (OBPG) contributor_role=Source of level 2 data. Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 cwhdf_version=3.4 Easternmost_Easting=243.0 et_affine=0.0 files=A2022139042500.L2_LAC_OC.nc, A2022139104500.L2_LAC_OC.nc, A2022139110000.L2_LAC_OC.nc, A2022139122000.L2_LAC_OC.nc, A2022139124000.L2_LAC_OC.nc, A2022139135000.L2_LAC_OC.nc, A2022139135500.L2_LAC_OC.nc, A2022139140000.L2_LAC_OC.nc, A2022139142000.L2_LAC_OC.nc, A2022139185500.L2_LAC_OC.nc, A2022139190000.L2_LAC_OC.nc, A2022139202500.L2_LAC_OC.nc, A2022139203000.L2_LAC_OC.nc, A2022139203500.L2_LAC_OC.nc, A2022139220500.L2_LAC_OC.nc, A2022139221000.L2_LAC_OC.nc, A2022139221500.L2_LAC_OC.nc, A2022139234500.L2_LAC_OC.nc, A2022139235000.L2_LAC_OC.nc, A2022139235500.L2_LAC_OC.nc gctp_datum=12 gctp_parm=0.0 gctp_sys=0 gctp_zone=0 geospatial_lat_max=38.0 geospatial_lat_min=30.0 geospatial_lat_resolution=0.0125 geospatial_lat_units=degrees_north geospatial_lon_max=243.0 geospatial_lon_min=232.0 geospatial_lon_resolution=0.0125 geospatial_lon_units=degrees_east geospatial_vertical_max=0.0 geospatial_vertical_min=0.0 geospatial_vertical_positive=up geospatial_vertical_units=m History=Translated to CF-1.0 Conventions by Netcdf-Java CDM (CFGridWriter2) Original Dataset = satellite/MW/chla/1day; Translation Date = 2022-05-23T21:30:07.275Z infoUrl=https://coastwatch.pfeg.noaa.gov institution=NOAA CoastWatch WCN keywords_vocabulary=GCMD Science Keywords Metadata_Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 naming_authority=gov.noaa.pfeg.coastwatch Northernmost_Northing=38.0 origin=NASA GSFC (OBPG) original_institution=NOAA CoastWatch, West Coast Node polygon_latitude=22.0 polygon_longitude=205.0 processing_level=3 project=CoastWatch (https://coastwatch.noaa.gov/) projection=geographic projection_type=mapped references=Aqua/MODIS information: https://oceancolor.gsfc.nasa.gov/ . MODIS information: https://coastwatch.noaa.gov/modis_ocolor_overview.html . rows=2321 satellite=Aqua sensor=MODIS source=satellite observation: Aqua, MODIS sourceUrl=(local files) Southernmost_Northing=30.0 standard_name_vocabulary=CF-1.0 start_time=0.0 time_coverage_end=2022-05-20T12:00:00Z time_coverage_start=2021-10-11T12:00:00Z Westernmost_Easting=232.0

NOAA CoastWatch distributes near real time Ekman current (in zonal, meridional, and modulus sets) and Ekman upwelling data. This data begins with wind velocity measurements from the ASCAT instrument onboard EUMETSAT's ASCAT satellite. ASCAT is a microwave scatterometer designed to measure surface winds over the global ocean. NOAA CoastWatch processes wind velocity to wind stress and wind stress curl, and finally to Ekman current and Ekman upwelling. acknowledgement=NOAA NESDIS COASTWATCH, NOAA SWFSC ERD cdm_data_type=Grid cols=1441 composite=true contributor_name=EUMETSAT and NOAA|NESDIS contributor_role=Source of level 2 data. Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 cwhdf_version=3.4 Easternmost_Easting=243.0 et_affine=0.0 gctp_datum=12 gctp_parm=0.0 gctp_sys=0 gctp_zone=0 geospatial_lat_max=38.0 geospatial_lat_min=30.0 geospatial_lat_resolution=0.25 geospatial_lat_units=degrees_north geospatial_lon_max=243.0 geospatial_lon_min=232.0 geospatial_lon_resolution=0.25 geospatial_lon_units=degrees_east geospatial_vertical_max=0.0 geospatial_vertical_min=0.0 geospatial_vertical_positive=up geospatial_vertical_units=m History=Translated to CF-1.0 Conventions by Netcdf-Java CDM (CFGridWriter2) Original Dataset = satellite/QA/wekm/1day; Translation Date = 2021-01-13T22:17:22.927Z history=EUMETSAT and NOAA|NESDIS 2021-01-12T07:02:55Z NOAA CoastWatch (West Coast Node) and NOAA SFSC ERD id=LQAwekmS1day_20210111120000 infoUrl=https://coastwatch.pfeg.noaa.gov institution=NOAA CoastWatch WCN keywords_vocabulary=GCMD Science Keywords Metadata_Conventions=CF-1.6, COARDS, Unidata Dataset Discovery v1.0 naming_authority=gov.noaa.pfeg.coastwatch Northernmost_Northing=38.0 origin=EUMETSAT and NOAA|NESDIS original_institution=NOAA CoastWatch, West Coast Node pass_date=18638 polygon_latitude=-75.0 polygon_longitude=0.0 processing_level=3 project=CoastWatch (https://coastwatch.noaa.gov/) projection=geographic projection_type=mapped references=NOAA/NESDIS https://manati.orbit.nesdis.noaa.gov/products/ASCAT.php . rows=601 satellite=METOP sensor=ASCAT source=satellite observation: METOP, ASCAT sourceUrl=(local files) Southernmost_Northing=30.0 standard_name_vocabulary=CF-1.0 start_time=0.0 time_coverage_end=2021-01-12T12:00:00Z time_coverage_start=2017-04-24T12:00:00Z Westernmost_Easting=232.0