IPCC WG II + III Requirements forAR5 Data Management

GO-ESSP Meeting, Paris, 11.-13.06.07

Michael Lautenschlager, Hans LuthardtWorld Data Center Climate

Model and Data / Max-Planck-Institute for Meteorology

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Content

Data Management in AR4

Requirements for AR5

Possible Contribution of WDC Climate

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Data management in AR4

Data management shared between WG I data archive at PCMDI

CMOR as NetCDF file archive interfaceData dissemination by Earth System Grid (ESG)

IPCC Data Distribution Centre (DDC) at WDC Climate (WDCC)

In operation since the IPCC SARDatabase system of WDCC with searchable catalogue

(based on CERA metadata model) and data storage in DB tables as time series of individual variables

Both archives provide web-based data access

WG II + III list of variables matches WG I archive for monthly means but not for daily data and climate indices

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PCMDI AR4 data catalogue

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PCMDI AR4 data access

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IPCC DDC AR4 data list

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IPCC DDC AR4 data catalogue summary

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IPCC DDC AR4 data access

Full CERA metadata

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CERA-2 Data Model

CERA Data Model of WDCC

Entry

Reference

Status

Distribution

Contact Coverage

Parameter

SpatialReferenceLocal Adm.

Data Access

Data Org

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WDCC data storage and access granularity

Model variables

Mod

el R

un T

ime

2 D: small BLOBS (180 KB)

3 D: large BLOBS (3 MB)

Raw data file: direct model output (1.3 – 16.2 GB)

Each columm is one BLOB Table in CERA-DB

Raw

data file in D

KR

Z A

rchive

T2M Precip SLP2D variables . . Temp

Water vapour

3D variables . .

T1T2T3.......Tn...................Tend

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WG II + III Data and Information Requirements

DDC user requests for SAR, TAR and AR4:

Reduced data sizeRegional subsetsTemporal subsets

‘simple’ data formats (e.g. ASCII, EXCEL) Data dissemination on media (CD, DVD, hard disc) Data visualization Advice on data applicability and data usage Availability of data processing tools

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WG II + III Data and Information Requirements

Data usage in WG II+III environment: Application of model data for solving questions on

mitigation of and adaptation to climate changes and for vulnerability studies

Applications fields of adaptation: tourism, agriculture, forestry, transportation, insurance, architecture, alternative energies…..

Climate model data are used as information in addition to observations.

Interdisciplinary data access where we cannot assume extensive experience about model data production, data structures and data formats

Forcing data for regional / local models and for process models

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WG II + III Data and Information Requirements

Requirements for model data: Data products are expected and not model raw data Complete daily / sub-daily time series of individual

variables, climate indices, climate extremes Requirements for metadata (browse + use):

Searchable data repository including information to decide on the usefulness of the data entity (e.g. scenario, model, variable, etc.)

Complete information to allow for data processing and use the model data (e.g. grid, variable, unit, time)

Requirements for services: Instructions how to use the data Data processing options for aggregation and extraction

in time and space and for visualization Specific user support (FAQs and emails requests)

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Possible Contribution of WDC Climate to AR5

WDCC plans to operate as one of the IPCC AR5 model data archives.

WDCC plans to offer limited archive space and catalogue resources (CERA metadata) to store and to disseminate IPCC AR5 metadata and/or time series additionally to the Hamburg climate model.

WDCC will continue IPCC DDC operations in cooperation with BADC (central archive of selected monthly mean time series and specific user support for WG II+III)

WDCC data catalogue can be part of an IPCC AR5 data repository

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WDCC metadata

ISO

191

15

Experiment

Dataset External 3Dataset External 2

Dataset External 1

http, grid, ftp, …

WDCC metadata

Experiment

Dataset Internal 3Dataset Internal 2

Dataset Internal 1ISO

191

15

User

A1

B1

Possible Contribution of WDC Climate to AR5

Data download via WWW (http) of via script/batch (jdbc)