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COLLOCATION MEETING: An overview on ECV validation process. Y ijian Z eng, B ob S u , W im T immermans J oris T immermans , B ert B oer Water Resources Department ITC, University of Twente The Netherlands. ECV-Related. Outlines. CalVal from ECV Definition Perspective

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collocation meeting an overview on ecv validation process

COLLOCATION MEETING:An overview on ECV validation process

YijianZeng, Bob Su, Wim Timmermans

Joris Timmermans, Bert Boer

Water Resources Department

ITC, University of Twente

The Netherlands

ECV-Related

outlines
Outlines
  • CalVal from ECV Definition Perspective
  • CalVal from ECV Data Generation Perspective
  • CalVal from Community Practice Perspective
1 calval from ecv definition perspective
1. CalValfrom ECV Definition Perspective

WMO-Space Programme: Data Processing Levels

Geophysical Variable

Goldberg (2002)

ECV

Essential climate variable is a geophysical variable that is associated with climate variation and change as well as the impact of climate change onto Earth

1 calval from ecv definition perspective1
1. CalValfrom ECV Definition Perspective

WMO-Space Programme: Data Processing Levels

Fundamental Climate Data Records are well-characterized, long-term data records of calibrated and quality-controlled sensor data designed to allow the generation of homogeneous products that are accurate and stable enough for climate monitoring

FCDR

TCDR

Thematic Climate Data Records are long-term data records of validated and quality controlled geophysical variables derived from FCDRs.

Geophysical Variable

ECV

1 calval from ecv definition perspective2
1. CalValfrom ECV Definition Perspective

FCDRs

SDRs

Fundamental Climate Data Records are well-characterized, long-term data records of calibrated and quality-controlled sensor data designed to allow the generation of homogeneous products that are accurate and stable enough for climate monitoring

Thematic Climate Data Records are long-term data records of validated and quality controlled geophysical variables derived from FCDRs.

EDRs are environmental data records that will employ radiative transfer model or specific retrieval algorithm to estimate the casual bio-geophysical parameters derived from SDRs.

SDRs are sensor data records that remove the sensor signature and are time tagged, geolocated, and calibrated antenna signals, without intention of being created for long-term stability and reliability.

EDRs

TCDRs

1 calval from ecv definition perspective3
1. CalValfrom ECV Definition Perspective

FCDR

TCDR

CalVal Process

Goldberg (2002)

Geophysical Variable

ECV

2 calval from data generation perspective
2. CalValfrom Data Generation Perspective

Dowell, M. D. P. Lecomte, R. Husband, J. Schulz, T. Mohr, Y. Tahara, R. Eckman, E. Lindstrom, C. Wooldridge, S. Hilding, J.Bates, B. Ryan, J. LaFeuille, and W. Zhang, 2013: Strategy Towards an Architecture for Climate Monitoring from Space. Pp. 39.

2 calval from data generation perspective1
2. CalValfrom Data Generation Perspective

Maturity Matric

  • Flow chard of creating and maintaining Long-term Climate Data Records:
  • A TCDR (Thematic CDR) may only be considered as a CDR upon the validation process given by A34, which may form just one component of an ECV

Dowell et al. (2013)

2 calval from data generation perspective2
2. CalValfrom Data Generation Perspective

WMO Space Programme- End-to-End process

Goldberg et al. (2011)

3 calval from community practice e g gcos principles
3. CalValfrom Community Practice (e.g. GCOS Principles)

GCOS-143 Guidelines

GCOS Climate Monitoring Principles

NRC (2004) Climate Data Record Generation Elements

ESA CCI: Production of ECV according to GCOS Requirements

2 wp3 d3 31
2. WP3 - D3.31

5 out of 7, covered

6 out of 20, covered

Being covered!

Being covered!

conclusions
Conclusions
  • Different Calval processes can lead to the generation of different types of data record (e.g SDR vs. FDR; EDR vs. TCDR);
  • Although calibration process has been well addressed in the current maturity matric (e.g. Bates’ Maturity Model, or Joerg’s System Maturity Matric), the calibration is not covered yet;
  • The analysis on how much extent the current maturity model can cover the GCOS guidelines, principles, or ESA CCI deliverables indicates the potential needs of including calibration and inter-calibration into the current existing maturity models.