OMI/Aura UV product validation using NILU-UV ground-based measurements in Thessaloniki, Greece

Zempila, Μ. Μ.; Koukouli, Maria-Elissavet; Bais, A. F.; Fountoulakis, Ilias; Arola, Antti; Kouremeti, Natalia; Balis, Dimitris

doi:10.1016/j.atmosenv.2016.06.009

Cited by 25 publications

(27 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, at 324 nm and 380 nm, the OMI data underestimated the UV irradiance by less than 5%. 199 These wavelengthdependent biases indicate that the spectral absorption and scattering properties of aerosols are not correctly addressed by the satellite data-retrieval algorithm.…”

Section: Satellite Validationmentioning

confidence: 99%

Ozone—climate interactions and effects on solar ultraviolet radiation

Bais

Bernhard

McKenzie

et al. 2019

Photochem Photobiol Sci

150

149

View full text Add to dashboard Cite

show abstract

Section: Satellite Validationmentioning

confidence: 99%

Ozone—climate interactions and effects on solar ultraviolet radiation

Bais

Bernhard

McKenzie

et al. 2019

Photochem Photobiol Sci

150

149

View full text Add to dashboard Cite

show abstract

“…Continuous estimates of the levels of UV irradiance at the Earth's surface on a global scale are available for the last four decades from satellite measurements [80][81][82][83]. Although in the last years there has been significant progress in the algorithms used for the retrieval of surface UV irradiance from satellites [84,85], the retrievals are still not sufficiently accurate over mountainous sites [86,87], highly reflective terrains [88], as well as over highly polluted environments [89][90][91], mainly because of the use of climatological data (for e.g., surface albedo and aerosol absorption) and simplifications in the algorithms. Furthermore, satellite retrievals represent the average of a finite area covered by the satellite pixel and are not necessarily representative for each point of the pixel, especially over complex, inhomogeneous terrains [92].…”

Section: Introductionmentioning

confidence: 99%

“…The integral of erythemal irradiance over a certain time period is usually referred as the erythemal dose. Highly accurate spectral measurements can be also used for the calibration and/or the validation of broad-band and narrow-band instruments [90,97,106] used to directly measure UV index.…”

Section: Introductionmentioning

confidence: 99%

Solar UV Irradiance in a Changing Climate: Trends in Europe and the Significance of Spectral Monitoring in Italy

et al. 2019

Self Cite

View full text Add to dashboard Cite

Review of the existing bibliography shows that the direction and magnitude of the long-term trends of UV irradiance, and their main drivers, vary significantly throughout Europe. Analysis of total ozone and spectral UV data recorded at four European stations during 1996–2017 reveals that long-term changes in UV are mainly driven by changes in aerosols, cloudiness, and surface albedo, while changes in total ozone play a less significant role. The variability of UV irradiance is large throughout Italy due to the complex topography and large latitudinal extension of the country. Analysis of the spectral UV records of the urban site of Rome, and the alpine site of Aosta reveals that differences between the two sites follow the annual cycle of the differences in cloudiness and surface albedo. Comparisons between the noon UV index measured at the ground at the same stations and the corresponding estimates from the Deutscher Wetterdienst (DWD) forecast model and the ozone monitoring instrument (OMI)/Aura observations reveal differences of up to 6 units between individual measurements, which are likely due to the different spatial resolution of the different datasets, and average differences of 0.5–1 unit, possibly related to the use of climatological surface albedo and aerosol optical properties in the retrieval algorithms.

show abstract

“…It consists of a calculation for the clear-sky case with corrections for clouds (or non-absorbing aerosols). Several validation studies of both TOMS and OMI-UV data have shown a positive bias in many locations affected significantly by absorbing aerosols (e.g., Arola et al, 2005;Zempila et al, 2016). Correction for the absorbing aerosols was suggested by Arola et al (2009), which exploits monthly aerosol climatology of Kinne et al (2013).…”

Section: Global Surface Uv Radiationmentioning

confidence: 99%

The Ozone Monitoring Instrument: overview of 14 years in space

et al. 2018

Self Cite

View full text Add to dashboard Cite

Abstract. This overview paper highlights the successes of the Ozone Monitoring Instrument (OMI) on board the Aura satellite spanning a period of nearly 14 years. Data from OMI has been used in a wide range of applications and research resulting in many new findings. Due to its unprecedented spatial resolution, in combination with daily global coverage, OMI plays a unique role in measuring trace gases important for the ozone layer, air quality, and climate change. With the operational very fast delivery (VFD; direct readout) and near real-time (NRT) availability of the data, OMI also plays an important role in the development of operational services in the atmospheric chemistry domain.

show abstract

OMI/Aura UV product validation using NILU-UV ground-based measurements in Thessaloniki, Greece

Cited by 25 publications

References 67 publications

Ozone—climate interactions and effects on solar ultraviolet radiation

Ozone—climate interactions and effects on solar ultraviolet radiation

Solar UV Irradiance in a Changing Climate: Trends in Europe and the Significance of Spectral Monitoring in Italy

The Ozone Monitoring Instrument: overview of 14 years in space

Contact Info

Product

Resources

About