Decomposition of Random Errors Inherent to HOAPS-3.2 Near-Surface Humidity Estimates Using Multiple Triple Collocation Analysis

Kinzel, Julian; Fennig, Karsten; Schröder, Marc; Andersson, Axel; Bumke, Karl; Hollmann, Rainer

doi:10.1175/jtech-d-15-0122.1

Cited by 17 publications

(40 citation statements)

References 60 publications

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“…For instance, the mean E-P (1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) difference in the North Atlantic between HOAPS 3 and IFREMER/GCPC are of the order of 0.2-0.5 mm/d [Andersson et al, 2011]. For the HOAPS 3.3 version, the uncertainty of the daily estimates of evaporation is 0-2 mm/d [Kinzel et al, 2016].…”

Section: 1002/2015jc011439mentioning

confidence: 98%

A high resolution salinity time series 1993–2012 in the North Atlantic from Argo and Altimeter data

2016

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The study of salinity changes has been hampered by the lack of temporal and spatial resolution of the observations. In order to improve the spatial and temporal distribution of salinity observations, we used the Gravest Empirical Mode (GEM) technique to calculate high‐resolution salinity distributions as a function of dynamic height for the period 1993–2012. This technique combined Argo and altimeter data to exploit the relationship between T/S profiles and dynamic height in the North Atlantic. The method was valid in the upper 700 m mainly at and near the pathways of the North Atlantic Current (NAC), but failed in regions with weak stratification or with ambiguities in the T/S relationships. Coherent, multiannual large‐scale variability was observed, with many features present in all regions, albeit with weaker amplitudes in the eastern basins. Some of the interannual features in the northeastern Atlantic basins were unrelated to the variability further south and west, pointing to an occasional advection of subtropical water in the eastern Atlantic. Origin and advection of salinity anomalies with the NAC from the North American Basin into the western subpolar North Atlantic are correlated with the state of the North Atlantic Oscillation (NAO) and dampened by the surface freshwater fluxes. Other mechanisms influencing the salinity pattern are the changing location of the subpolar front, also related to the NAO. The large multiyear variability in the 20 year time series obscured any potential trends caused by global warming. Only the Rockall Trough showed a salinity increase of 0.03 per decade.

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Section: 1002/2015jc011439mentioning

confidence: 98%

A high resolution salinity time series 1993–2012 in the North Atlantic from Argo and Altimeter data

2016

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“…Further applications include calibration and validation of satellite data (e.g. Jackson and Wick, 2010;Roberts et al, 2010;Bentamy et al, 2013;Kinzel et al, 2016) and assessment of climate model output (Flato et al, 2013).…”

Section: Subsequent Updates and Extensionsmentioning

confidence: 99%

ICOADS Release 3.0: a major update to the historical marine climate record

Freeman

Woodruff

Worley

et al. 2016

Intl Journal of Climatology

322

314

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ABSTRACT:We highlight improvements to the International Comprehensive Ocean-Atmosphere Data Set (ICOADS) in the latest Release 3.0 (R3.0; covering . ICOADS is the most widely used freely available collection of surface marine observations, providing data for the construction of gridded analyses of sea surface temperature, estimates of air-sea interaction and other meteorological variables. ICOADS observations are assimilated into all major atmospheric, oceanic and coupled reanalyses, further widening its impact. R3.0 therefore includes changes designed to enable effective exchange of information describing data quality between ICOADS, reanalysis centres, data set developers, scientists and the public. These user-driven innovations include the assignment of a unique identifier (UID) to each marine report -to enable tracing of observations, linking with reports and improved data sharing. Other revisions and extensions of the ICOADS' International Maritime Meteorological Archive common data format incorporate new near-surface oceanographic data elements and cloud parameters. Many new input data sources have been assembled, and updates and improvements to existing data sources, or removal of erroneous data, made. Coupled with enhanced 'preliminary' monthly data and product extensions past 2014, R3.0 provides improved support of climate assessment and monitoring, reanalyses and near-real-time applications.

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“…In order to further enhance the uncertainty decomposition, and with that the actual retrieval uncertainty estimation, Kinzel et al [2016] developed the so called multiple triple collocation (MTC) method. This novel 10.1002/2017RG000562 Figure A1.…”

Section: A12 Example Of Mtc Error Decomposition For Near-surface Spmentioning

confidence: 99%

“…technique enables the quantification of E c , E ins , and E tot . In Kinzel et al [2016] MTC was applied to estimate E tot of the near-surface humidity (q a ) from HOAPS.…”

Section: 1002/2017rg000562mentioning

confidence: 99%

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Validation practices for satellite‐based Earth observation data across communities

Loew

Bell

Brocca

et al. 2017

Reviews of Geophysics

Self Cite

187

137

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Assessing the inherent uncertainties in satellite data products is a challenging task. Different technical approaches have been developed in the Earth Observation (EO) communities to address the validation problem which results in a large variety of methods as well as terminology. This paper reviews state‐of‐the‐art methods of satellite validation and documents their similarities and differences. First, the overall validation objectives and terminologies are specified, followed by a generic mathematical formulation of the validation problem. Metrics currently used as well as more advanced EO validation approaches are introduced thereafter. An outlook on the applicability and requirements of current EO validation approaches and targets is given.

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Decomposition of Random Errors Inherent to HOAPS-3.2 Near-Surface Humidity Estimates Using Multiple Triple Collocation Analysis

Cited by 17 publications

References 60 publications

A high resolution salinity time series 1993–2012 in the North Atlantic from Argo and Altimeter data

A high resolution salinity time series 1993–2012 in the North Atlantic from Argo and Altimeter data

ICOADS Release 3.0: a major update to the historical marine climate record

Validation practices for satellite‐based Earth observation data across communities

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