DFS - GEWEX water vapor assessment
Contents
1. 500 300 hPa lt 300 hPa Time resolution Climate and Ocean once day Weather 4 x day Time period 1988 2009 15 Main geophysical parameter s in the data record Precipitable water kg m2 28 11 2013 14 24 SurveyMonkey Umfrageergebnisse https de surveymonkey net MySurvey_ResponsesDetail aspx sm Other Use Table 4 2 of the WMO Codes to specify parameters not listed above Layer precipitable water vapor 16 Processing level according to the WMO definition Level 4 Composite product multisource or result of model analysis of lower level data 17 If the data record is of Level 3 type can underlying Level 2 data be provided Keine Beantwortung 18 Ancillary information in the data record of special interest to G VAP Other please specify Satellite and surface based gridded data source codes are provided 19 Satellite instrument s used to generate the data record Specify NONE first row in case no satellite data have been used to produce the data record Main instrument s 1 Ancillary instrument s 2 NONE AATSR x AIRS AMSR E AMSU B ASTER ATMS ATOVS CERES CriS ERBE GOME GOME 2 HIRS x IASI MERIS MHS MODIS MVIRI MWR POLDER SCIAMACHY SEVIRI SSMI I x SSMIIS TES TOVS Other instruments not listed above see EO Handbook Indicate also whether other acts as main or ancillary data source 20 In situ and or ground based remote sensing techniques or2. data used to generate the data record Specify NONE first row in case such techniques have not been used to produce the data record Main instrument s 1 Ancillary instrument s 2 3 von 8 28 11 2013 14 24 SurveyMonkey Umfrageergebnisse https de surveymonkey net MySurvey_ResponsesDetail aspx sm NONE Airborne in situ observations Frost point hygrometer Ground based GNSS atmospheric sounding X GPS radio occultation Interferometry SWIR TIR Lidar Radiative fluxes pyranometer etc Radiometer microwave Radiometer SWIR TIR Radiometer UV VIS NIR Radiosondes x Other instruments not listed above Indicate also whether other acts as main or ancillary data source 21 Re analysis scheme s used to generate the data record Specify NONE first row if such schemes have not been used to generate the data record Main data source 1 Ancillary data source 2 NONE ERA Interim JRA55 MERRA x NCEP DOE R2 Other please specify 22 North south density of the information in data record Format Provided as ground sampling distance value plus unit e g 0 01 deg Specify 0 0 in case data represent a single location 1 0 degree or 0 5 degree 23 East west density of the information in data record Format Provided as ground sampling distance value plus unit e g 10 km Specify 0 0 in case data represent a single location 1 0 degree or 0 5 degree 24 Number of distinct vertical
3. identify the data record NASA Water Vapor Project MEaSUREs 8 Acronym or short name under which data record is commonly known Ergebnisse analysieren 28 11 2013 14 24 SurveyMonkey Umfrageergebnisse 2 von 8 https de surveymonkey net MySurvey_ResponsesDetail aspx sm NVAP M 9 Processing version of the data record Format Specify no versioning if no formal versioning scheme has been established 0 0 10 Purpose of data record within G VAP Dataset to be evaluated 11 Language s used within data record Format Provide language codes according to ISO 639 2 ENG english 12 Reference date for the data record Format DD MM YYYY Example 13 11 2006 01 04 2013 13 Event used to describe the data record reference date Publication 14 Brief description abstract of the data record s contents The abstract should provide a clear and concise statement that enables the reader to understand the content of the data record Please respect the following rules a Aim to be understood by non experts b Do not include general background information c Avoid jargon and unexplained abbreviations d The abstract should be in English e The abstract should not exceed 1000 characters Example taken from the guidelines on WMO core metadata profile Products from the METNO Numerical Weather Prediction model METNO is running the HIRLAM model Check out http www hirlam org for details The model o
4. layers within data record Specify N 1 for total column products Provide textual description in case one single number can t be assigned 25 Typical timespan between sequential information in data record 26 Typical delay between instrumental observation and release of the processed data product Irregularly 27 Geographical bounding box Co ordinates of minimum bounding rectangle fully encompassing the data record In case data record represents one single location enter identical values for the two corners ofthe bounding box 4 von 8 28 11 2013 14 24 SurveyMonkey Umfrageergebnisse 5 von 8 https de surveymonkey net MySurvey_ResponsesDetail aspx sm Longitudes in deg between 180 and 180 east hemisphere pos Latitudes in deg between 90 and 90 north hemisphere pos Northernmost latitude 90 0 Southernmost latitude 90 0 Easternmost longitude 180 0 Westernmost longitude 180 0 28 Number of geographically distinct sites in data record Specify N 1 for data records from one single station Data records derived from satellite measurements will typically have N gt 10000 distinct sites gt 10000 29 Vertical extension represented by the data record Format Value plus unit e g 1013 hPa Bottommost boundary Surface Topmost boundary lt 300 hPa 30 Time span covered by data record Format DD MM YYYY Earliest date 01 01 1988 Latest date 31 12 2009 31 Limitat
5. project nvap nvap m_table 48 Size of data record in the format specified above expressed in megabytes Example 566 for a file size of 566 MB see e g this tool to convert between file size units Transfer size in MB 48000 49 Instructions for users to enable data access if necessary Example Data record is password protected please contact the responsible person to obtain the access credentials Keine Beantwortung 50 Additional information of relevance to potential users Complete replacement of heritage NVAP data which is now not available except via direct request 51 Feedback to this G VAP data record entry form Have we missed relevant aspects concerning your data record Are some aspects covered in too much detail Do you have suggestions for improving this entry form Keine Beantwortung Community Entwickler Facebook Twitter Linkedin Unser Blog Google YouTube ber uns Management Team Vorstand Partner Newsroom Kontakt Auftr ge Sitemap Hilfe Richtlinien Nutzungsbedingungen Datenschutzrichtlinie Anti Spam Richtlinie Sicherheitsrichtlinien https de surveymonkey net MySurvey_ResponsesDetail aspx sm Language English Espa ol Portugu s Deutsch Nederlands Fran ais Pycckuii Italiano Dansk Svenska HK Norsk Suomi E AC RHE T rk e Copyright 1999 2013 SurveyMonkey 28 11 2013 14 24
6. SurveyMonkey Umfrageergebnisse 1 von 8 Ubersicht anzeigen Beantwortungen durchsuchen Beantwortungen filtern Kreuztabelle erstellen Beantwortungen herunterladen Beantwortungen freigeben https de surveymonkey net MySurvey_ResponsesDetail aspx sm Umfrage entwerfen Beantwortungen erfassen Standardbericht 5 von 7 Befragten wird werden angezeigt Beantwortungstyp Collector Normale Beantwortung G VAP Metadata Dataset 01 E Mail Einladung E Mail Adresse Name janice atmos colostate edu Janice Bytheway Benutzerdefinierter Wert IP Adresse leer 129 82 109 51 Beantwortung gestartet 15 Juli 2013 16 23 52 Beantwortung ge ndert 26 September 2013 00 00 34 1 Organization s owning the data record described below Format Official name in national language English if available Example Deutscher Wetterdienst German Weather Service National Aeronautics and Space Administration 2 Commonly used acronym or short name for the above organisation Example DWD NASA 3 G VAP contact person for the data record described below Format Last name first name Example Smith Jane Tom Vonder Haar 4 E mail address of the G VAP contact person thomas vonderhaar colostate edu 5 Reference date for this G VAP catalogue entry Format DD MM YYYY Example 31 12 2012 25 09 2013 6 Event used to describe the catalogue entry reference date Creation 7 Title i e the name usually used to
7. explain how to work with data record For each referenced document provide as a minimum the following information 1 Authors s 2 Document title 3 Year of creation 4 URL to document if available State not established in case no user manual has been established Vonder Haar T H J Forsythe J L Bytheway NVAP MEaSUREs NVAP M Readme 2013 https eosweb larc nasa gov sites default files project nvap guide NVAPM_User_Guide pdf 44 Articles in peer reviewed journals or conference proceedings based on data record For each referenced document provide as a minimum the following information 1 Authors s 2 Document title 3 Year of creation 4 URL to document if available State not established in case data record has not yet been described in the scientific literature Vonder Haar T H J L Bytheway and J M Forsythe 2012 Weather and climate analyses using improved global water vapor observations Geophys Res Lett 39 L16802 doi 10 1029 2012GL052094 45 Name of the data transfer format s Example NetCDF netcdf 46 Version of the format date number etc Example 3 6 0 4 0 28 11 2013 14 24 SurveyMonkey Umfrageergebnisse 8 von 8 47 URL s to data record via http https ftp scp Fictious example of an URL https www beautifuldata org TCWV 5 0 State not available online in case data record can t be accessed over the internet https eosweb larc nasa gov
8. geted user segment s for data record Example Meteorological services environmental authorities State not established if user segments have not been analysed Climate researchers Modelers Weather researchers Hydrologists 40 Thematic application area for the data record Example Support to NWP regional climate modelling State not established if application areas have not been analysed 28 11 2013 14 24 SurveyMonkey Umfrageergebnisse 7 von 8 https de surveymonkey net MySurvey_ResponsesDetail aspx sm Comparison to NWP Climate model comparison Process studies e g monsoon MJO 41 Documentation on user requirements For each referenced document provide as a minimum the following information 1 Authors s 2 Document title 3 Year of creation 4 URL to document if available State not established in case no user requirements document has been established Not Established 42 ATBD s describing how data record is generated For each referenced document provide as a minimum the following information 1 Authors s 2 Document title 3 Year of creation 4 URL to document if available State not established in case no ATBD has been established Vonder Haar T H J Forsythe J L Bytheway NASA Water Vapor Project MEaSUREs Algorithm Theoretical Basis Document 2013 Version 2 https eosweb larc nasa gov sites default files project nvap NVAP_M_ATBD_Feb2013 pdf 43 User manual to
9. ions and known issues affecting the fitness for use of data record Format indicate relevant limitations in short sentences Example 1 Data quality is poor north of 60 N known issue 2 Product available for clear sky conditions only limitation 3 Data gap between 11 2006 and 01 2008 limitation 1 lt 300 hPa water vapor only has signal in the Tropics 2 Clear sky sampling bias present over land 3 Ocean total column water vapor is the most reliable component of NVAP M 4 Land product less reliable before 2003 due to lack of AIRS data 5 HIRS record might contain time dependent biases currently under investigation 32 Constraints relating to intellectual property Data records submitted to G VAP need to adhere to the G VAP data policy Otherwise a data record can not be accepted to the G VAP activities In case you re interested in participating to G VAP but can t adhere to the data policy please contact the G VAP co chairs Adheres to the G VAP data policy 33 Short statement of how the data record was created Where possible include statements on the following 1 Source data also list important ancillary data 2 Data processing e g retrieval method resampling 3 Method of updating 4 Quality control processes 5 Other important facts e g product derived from FCDR As a minimum a general statement should be made about the provenance of the dataset 28 11 2013 14 24 SurveyMonkey Umfrageergebni
10. is based on each published retrieval algorithm SSM I HIRS AIRS NVAP M Weather has no attempt at time stability NVAP M Climate does not use GPS data since it is only available for part of 1988 2009 36 Method used for data record evaluation Indirect External knowledge has been used for evaluation e g plausibility considerations Other Comments Many possible of measurements were not used e g TOPEX SCIAMACHY GOME MODIS so many types of indpendent comparisons are possible 37 Ancillary data fundamental to the evaluation of data record For each referenced dataset provide as a minimum the following information 1 Title 2 Acronym if applies 3 Owner 4 URL to dataset if available Keine Beantwortung 38 Validation evaluation report s For each referenced document provide as a minimum the following information 1 Authors s 2 Document title 3 Year of creation 4 URL to document if available State not established in case no validation evaluation report has been established Vonder Haar T H J L Bytheway and J M Forsythe 2012 Weather and climate analyses using improved global water vapor observations Geophys Res Lett 39 L16802 doi 10 1029 2012GL052094 Vonder Haar T H J Forsythe J L Bytheway NASA Water Vapor Project MEaSUREs Algorithm Theoretical Basis Document Version 2 https eosweb larc nasa gov sites default files project nvap NVAP_M_ATBD_Feb2013 pdf 39 Tar
11. sse 6 von 8 https de surveymonkey net MySurvey_ResponsesDetail aspx sm NVAP M emphasizes time consistent radiances and algorithms SSM I total precipitable water vapor derived from new FCDR produced at Colorado State University with retrieval of Elsaesser and Kummerow 2008 HIRS layered and total precipitable water retrieved from NCDC intercalibrated radiances using algorithm of Engelen and Stephens 1999 A priori climatology derived from AIRS Version 5 level 3 product for 2003 2009 AIRS Version 5 retrievals used Version 6 became available after project completion Radiosondes from the NOAA IGRA data set A simple error weighted merge is performed at each grid box No spatial or temporal smoothing is applied Missing data regions are left missing rather than being interpolated 34 Short statement on the quality of the satellite radiances used to derive the data record This question only applies to satellite derived data records State does not apply for all other data SSM I radiance quality is expected to be excellent following a recent intensive intercalibration effort see recent papers by Berg Sapiano HIRS radiance quality should be good from NCDC intercalibration although further improvements are likely possible Spectral change of HIRS channel 10 through time might cause some discontinuities AIRS quality should be excellent 35 Short statement on uncertainty estimates and degree of homogeneity stability Uncertainty
12. utput has been subsetted reprojected and reformatted using FIMEX http wiki met no fimex Grid resolution degrees 0 216 X 0 216 Contained fields potential temperature K geopotential height m 2 s 2 u velocity m s 1 v velocity m s 1 vertical velocity Pa s 1 and relative humidity Levels hPa 1000 925 850 700 500 400 300 250 200 150 100 70 50 30 and 10 Forecast offset times hours 0 3 6 9 12 15 18 21 24 30 36 42 48 54 60 and 66 The NASA MEaSUREs Making Earth System Data Records for Use in Research Environments program began in 2008 and has the goal of creating stable community accepted Earth System Data Records ESDRs for a variety of geophysical time series The NASA Water Vapor Project NVAP MEaSUREs data set version 0 0 was released in April 2013 and completely replaces the heritage NVAP data set created in the 1990 s It was created from polar orbiter satellite data along with radiosondes and surface based Global Positioning System meaurements It contains three data types oriented towards different users Climate strives for maximum temporal consistency Weather strives for maximum spatial and temporal coverage and Ocean is a microwave only record over the ocean Grid resolution 1 degree Ocean and Climate or 1 2 degree Weather data Contained relevant fields Total and layered precipitable water vapor Data source codes Layers Total column plus 1000 700 hPa 700 500 hPa
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