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Dataset

 

Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - Input data for Figure 2.13 (v20211022)

Update Frequency: Not Planned
Latest Data Update: 2022-06-30
Status: Completed
Online Status: ONLINE
Publication State: Citable
Publication Date: 2022-07-15
DOI Publication Date: 2023-07-04
Download Stats: last 12 months
Dataset Size: 4 Files | 77MB
Abstract

Input Data for Figure 2.13 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6).

Figure 2.13 shows the global trends in surface specific humidity and surface relative humidity over 1973-2019

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How to cite this dataset
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When citing this dataset, please include both the data citation below (under 'Citable as') and the following citation for the report component from which the figure originates:
Gulev, S.K., P.W. Thorne, J. Ahn, F.J. Dentener, C.M. Domingues, S. Gerland, D. Gong, D.S. Kaufman, H.C. Nnamchi, J. Quaas, J.A. Rivera, S. Sathyendranath, S.L. Smith, B. Trewin, K. von Schuckmann, and R.S. Vose, 2021: Changing State of the Climate System. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change[Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, pp. 287–422, doi:10.1017/9781009157896.004.

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Figure subpanels
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The figure has four panels, with input data provided for panels (a) HadISDH_blendq_1_0_0_2019f.nc and (c) HadISDH_blendRH_1_0_0_2019f.nc

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List of data provided
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This dataset contains global maps of specific and relative humidity trends over 1973-2019

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Data provided in relation to figure
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This dataset is the input data used in the code that generates panel (a) and panel (c) for figure 2.13

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Notes on reproducing the figure from the provided data
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The following changes to filenames were made to archive the data (due to filenaming restrictions). To use the data with any associated figure code, the filenames should be reverted.

HadISDH_blendq_1_0_0_2019f.nc -> HadISDH.blendq.1.0.0.2019f.nc
HadISDH_blendRH_1_0_0_2019f.nc ->  HadISDH.blendRH.1.0.0.2019f.nc

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Sources of additional information
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The following weblinks are provided in the Related Documents section of this catalogue record:
- Link to the report component containing the figure (Chapter 2)
- Link to the Supplementary Material for Chapter 2, which contains details on the input data used in Table 2.SM.1
- Link to the figure on the IPCC AR6 website

Citable as:  Rivera, J.A.; Willett, K. (2023): Chapter 2 of the Working Group I Contribution to the IPCC Sixth Assessment Report - Input data for Figure 2.13 (v20211022). NERC EDS Centre for Environmental Data Analysis, 04 July 2023. doi:10.5285/02fd1d886bad40f3bb2eef3271900823. https://dx.doi.org/10.5285/02fd1d886bad40f3bb2eef3271900823
Abbreviation: Not defined
Keywords: IPCC-DDC, IPCC, Intergovernmental Panel on Climate Change, AR6, WG1, WGI, Sixth Assessment Report, Working Group I, Physical Science Basis, Chapter 2, Changing state, Multi-millennial context, pre-industrial, Natural forcing, anthropogenic forcing, Radiative forcing, Large-scale indicators, observed changes, Modes of variability, Figure 2.13, global specific humidity, global relative humidity

Details

Previous Info:
No news update for this record
Previously used record identifiers:
No related previous identifiers.
Access rules:
Public data: access to these data is available to both registered and non-registered users.
Use of these data is covered by the following licence: http://creativecommons.org/licenses/by/4.0/. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data produced by Intergovernmental Panel on Climate Change (IPCC) authors and supplied for archiving at the Centre for Environmental Data Analysis (CEDA) by the Technical Support Unit (TSU) for IPCC Working Group I (WGI).
Data curated on behalf of the IPCC Data Distribution Centre (IPCC-DDC).
Data Quality:
Data as provided by the IPCC
File Format:
txt, netCDF

Related Documents

 SUPPLEMENTARY MATERIAL FOR REPORT CHAPTER: Gulev, S.K., P.W. Thorne, J. Ahn, F.J. Dentener, C.M. Domingues, S. Gerland, D. Gong, D.S. Kaufman, H.C. Nnamchi, J. Quaas, J.A. Rivera, S. Sathyendranath, S.L. Smith, B. Trewin, K. von Schuckmann, and R.S. Vose, 2021: Changing State of the Climate System Supplementary Material. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change
 ORIGIN OF FIGURE (IPCC REPORT CHAPTER): Gulev, S.K., P.W. Thorne, J. Ahn, F.J. Dentener, C.M. Domingues, S. Gerland, D. Gong, D.S. Kaufman, H.C. Nnamchi, J. Quaas, J.A. Rivera, S. Sathyendranath, S.L. Smith, B. Trewin, K. von Schuckmann, and R.S. Vose, 2021: Changing State of the Climate System. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change
 LINK TO FIGURE

Process overview

This dataset was generated by the computation detailed below.
Title

Caption for Figure 2.13 from Chapter 2 of the Working Group I (WGI) Contribution to the Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6)
Abstract

Changes in surface humidity. Changes in surface humidity. (a) Trends in surface specific humidity over 1973–2019. Trends are calculated using OLS regression with significance assessed following AR(1) adjustment after Santer et al. (2008) ; ‘x’ marks denote non-significant trends). (b) Global average surface specific humidity annual anomalies (1981–2010 base period). (c) as (a) but for the relative humidity. (d) as (b) but for the global average surface relative humidity annual anomalies. Further details on data sources and processing are available in the chapter data table (Table 2.SM.1).
Input Description

None
Output Description

None
Software Reference

None
  • units: %rh
  • var_id: rh_abs_combinederr
  • long_name: Relative Humidity monthly mean actual full uncertainty
  • units: %rh
  • var_id: rh_abs_obserr
  • long_name: Relative Humidity monthly mean actual observation uncertainty (2 sigma)
  • units: %rh
  • var_id: rh_abs_samplingerr
  • long_name: Relative Humidity monthly mean actual sampling uncertainty
  • units: %rh
  • var_id: rh_abs
  • long_name: Relative Humidity monthly mean actuals
  • units: %rh
  • var_id: rh_anoms
  • long_name: Relative Humidity monthly mean anomalies
  • units: %rh
  • var_id: rh_anoms_combinederr
  • long_name: Relative Humidity monthly mean anomaly full uncertainty
  • units: %rh
  • var_id: rh_anoms_obserr
  • long_name: Relative Humidity monthly mean anomaly observation uncertainty (2 sigma)
  • units: %rh
  • var_id: rh_anoms_samplingerr
  • long_name: Relative Humidity monthly mean anomaly sampling uncertainty
  • units: %rh
  • var_id: rh_clims
  • long_name: Relative Humidity monthly mean climatologies
  • units: %rh
  • var_id: rh_land_std
  • long_name: Relative Humidityland monthly mean standard deviations
  • units: %rh
  • var_id: rh_marine_clims_std
  • long_name: Relative Humiditymarine monthly mean climatological standard deviation
  • units: g/kg
  • var_id: q_abs_combinederr
  • long_name: Specific Humidity monthly mean actual full uncertainty
  • units: g/kg
  • var_id: q_abs_obserr
  • long_name: Specific Humidity monthly mean actual observation uncertainty (2 sigma)
  • units: g/kg
  • var_id: q_abs_samplingerr
  • long_name: Specific Humidity monthly mean actual sampling uncertainty
  • units: g/kg
  • var_id: q_abs
  • long_name: Specific Humidity monthly mean actuals
  • units: g/kg
  • var_id: q_anoms
  • long_name: Specific Humidity monthly mean anomalies
  • units: g/kg
  • var_id: q_anoms_combinederr
  • long_name: Specific Humidity monthly mean anomaly full uncertainty
  • units: g/kg
  • var_id: q_anoms_obserr
  • long_name: Specific Humidity monthly mean anomaly observation uncertainty (2 sigma)
  • units: g/kg
  • var_id: q_anoms_samplingerr
  • long_name: Specific Humidity monthly mean anomaly sampling uncertainty
  • units: g/kg
  • var_id: q_clims
  • long_name: Specific Humidity monthly mean climatologies
  • units: g/kg
  • var_id: q_land_std
  • long_name: Specific Humidityland monthly mean standard deviations
  • units: g/kg
  • var_id: q_marine_clims_std
  • long_name: Specific Humiditymarine monthly mean climatological standard deviation
  • units: standard
  • var_id: marine_actual_pseudo_stations
  • long_name: actual number of pseudo stations over ocean
  • var_id: land_actual_n_stations
  • long_name: actual number of stations over land
  • units: standard
  • units: standard
  • var_id: marine_mean_pseudo_stations
  • long_name: mean number of pseudo stations over ocean
  • units: standard
  • var_id: land_mean_n_stations
  • long_name: mean number of stations over land
  • units: month
  • var_id: month
  • long_name: month of year
  • standard_name: time in months
  • units: standard
  • var_id: marine_climstd_n_grids
  • long_name: number of 1x1 daily grids in the climatological standard deviation over ocean
  • units: standard
  • var_id: marine_clim_n_grids
  • long_name: number of 1x1 daily grids in the climatology over ocean
  • units: standard
  • var_id: marine_n_grids
  • long_name: number of 1x1 daily grids with data over ocean
  • units: standard
  • var_id: marine_n_obs
  • long_name: number of marine observations
  • units: standard
  • var_id: marine_climstd_n_obs
  • long_name: number of marine observations in the climatological standard deviation
  • units: standard
  • var_id: marine_clim_n_obs
  • long_name: number of marine observations in the climatology

Co-ordinate Variables

  • units: degrees_north
  • standard_name: latitude
  • var_id: latitude
  • long_name: latitude
  • units: degrees_east
  • standard_name: longitude
  • var_id: longitude
  • long_name: longitude
  • long_name: time
  • standard_name: time
  • var_id: time
  • units: days
Coverage
Temporal Range
Start time:
1973-01-01T12:00:00
End time:
2019-12-31T12:00:00
Geographic Extent

 
90.0000°
  
-180.0000°
  
180.0000°
 
-90.0000°
  
Related parties
Authors (2)
Publishers (1)