Results from the first ARM diffuse horizontal shortwave irradiance comparison

Michalsky, Joseph; Dolce, R.; Dutton, Ellsworth G; Haeffelin, Martial; Major, G.; Schlemmer, James; Slater, D. W.; Hickey, J. R.; Jeffries, W. Q.; Los, Alexander; Mathias, Donovan; McArthur, L. J. B.; Philipona, Rolf; Reda, Ibrahim; Stoffel, T.

doi:10.1029/2002jd002825

Cited by 27 publications

(28 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ventilation prevents dew and frost formation on the domes, which otherwise frequently disturb the measurements, especially at high latitudes. The ventilation also significantly reduces the thermal offset problem in all thermopile pyranometers, such as the ones used in Finland and Sweden [32,33].…”

Section: Methodsmentioning

confidence: 99%

Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden

Riihelä

Carlund²,

Trentmann³

et al. 2015

Remote Sensing

View full text Add to dashboard Cite

Accurate determination of the amount of incoming solar radiation at Earth's surface is important for both climate studies and solar power applications. Satellite-based datasets of solar radiation offer wide spatial and temporal coverage, but careful validation of their quality is a necessary prerequisite for reliable utilization. Here we study the retrieval quality of one polar-orbiting satellite-based dataset (CLARA-A1) and one geostationary satellite-based dataset (SARAH), using in situ observations of solar radiation from the Finnish and Swedish meteorological measurement networks as reference. Our focus is on determining dataset quality over high latitudes as well as evaluating daily mean retrievals, both of which are aspects that have drawn little focus in previous studies. We find that both datasets are generally capable of retrieving the levels and seasonal cycles of solar radiation in Finland and Sweden well, with some limitations. SARAH exhibits a slight negative bias and increased retrieval uncertainty near the coverage edge, but in turn offers better precision (less scatter) in the daily mean retrievals owing to the high sampling rate of geostationary imaging.

show abstract

Section: Methodsmentioning

confidence: 99%

Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden

Riihelä

Carlund²,

Trentmann³

et al. 2015

Remote Sensing

View full text Add to dashboard Cite

show abstract

“…This paper discusses the outcome of the second intensive observation period (IOP) conducted to simultaneously measure diffuse irradiance with mostly commercial pyranometers, but also a few prototypes. In the first IOP [ Michalsky et al , 2003], eight of the 14 instruments participating agreed to within 2 W m −2 of the mean of the five most consistent instruments of the group. All except one of the remaining six pyranometers yielded a root‐mean‐square difference larger than 4 W m −2 .…”

Section: Introductionmentioning

confidence: 99%

Toward the development of a diffuse horizontal shortwave irradiance working standard

Michalsky

Dolce²,

Dutton³

et al. 2005

J. Geophys. Res.

Self Cite

View full text Add to dashboard Cite

[1] The first intensive observation period (IOP) to simultaneously measure diffuse horizontal shortwave irradiance (scattered solar radiation that falls on a horizontal surface) with a wide array of shaded pyranometers suggested that a consensus might be reached that would permit the establishment of a standard with a smaller uncertainty than previously achieved. A second IOP has been held to refine the first IOP measurements using a uniform calibration protocol, offset corrections for all instruments and validation of those corrections, improvements in some of the instruments, and better data acquisition. The venue for both IOPs was the Department of Energy's Atmospheric Radiation Measurement central facility in northern Oklahoma. The 9 days of measurements in October 2003 included a better mixture of clear and overcast conditions than during the first IOP and revealed considerable differences among the instruments' responses for different cloud conditions. Four of the 15 instruments were eliminated as candidates to be included in the standard because of noisy signals, inadequate offset correction, or instability with respect to the majority of the measurements. Eight pyranometers agreed to within ±2% for clear-sky conditions. Three others have a high bias on clear days relative to these eight, but all 11 agree within ±2% on overcast days. The differences and causes of this behavior under clear and cloudy skies are examined.

show abstract

“…The pyranometer is calibrated against a secondary standard. An inter-comparison between 15 pyranometers (Michalsky et al, 2003) shows that the KZ factory calibration and instrument performance are very satisfactory (1 W/m 2 root mean square error). Comparisons of pyrgeometers performed at the ARM Oklahoma and Alaska sites revealed very good consistency between the KZ CG4 and the WRC absolute skyscanning radiometer (Philipona et al, 2001).…”

Section: Surface Radiative Flux Stationmentioning

confidence: 99%

SIRTA, a ground-based atmospheric observatory for cloud and aerosol research

et al. 2005

Self Cite

View full text Add to dashboard Cite

Abstract. Ground-based remote sensing observatories have a crucial role to play in providing data to improve our understanding of atmospheric processes, to test the performance of atmospheric models, and to develop new methods for future space-borne observations. Institut Pierre Simon Laplace, a French research institute in environmental sciences, created the Site Instrumental de Recherche par Télédétection Atmosphérique (SIRTA), an atmospheric observatory with these goals in mind. Today SIRTA, located 20 km south of Paris, operates a suite a state-of-the-art active and passive remote sensing instruments dedicated to routine monitoring of cloud and aerosol properties, and key atmospheric parameters. Detailed description of the state of the atmospheric column is progressively archived and made accessible to the scientific community. This paper describes the SIRTA infrastructure and database, and provides an overview of the scientific research associated with the observatory. Researchers using SIRTA data conduct research on atmospheric processes involving complex interactions between clouds, aerosols and radiative and dynamic processes in the atmospheric column. Atmospheric modellers working with SIRTA observations develop new methods to test their models and innovative analyses to improve parametric representations of sub-grid processes that must be accounted for in the model. SIRTA provides the means to develop data interpretation tools for future active remote sensing missions in space (e.g. CloudSatCorrespondence to: M. Haeffelin (martial.haeffelin@lmd.polytechnique.fr) and CALIPSO). SIRTA observation and research activities take place in networks of atmospheric observatories that allow scientists to access consistent data sets from diverse regions on the globe.

show abstract

Results from the first ARM diffuse horizontal shortwave irradiance comparison

Cited by 27 publications

References 10 publications

Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden

Validation of CM SAF Surface Solar Radiation Datasets over Finland and Sweden

Toward the development of a diffuse horizontal shortwave irradiance working standard

SIRTA, a ground-based atmospheric observatory for cloud and aerosol research

Contact Info

Product

Resources

About