Solar irradiance reference spectra

Thuillier, G.; Floyd, L.; Woods, Thomas N.; Cebula, R. P.; Hilsenrath, E.; Hersé, M.; Labs, D.

doi:10.1029/141gm13

Cited by 78 publications

(59 citation statements)

References 47 publications

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“…A comparison of the CAVIAR ESS with those of [5] ("Fontenla ESS"), [6] ("Kurucz-modelled ESS") and [1] ("Thuillier ESS"), confirms that there are some significant differences between them, both in terms of the fine structure in the ESS, but also in the absolute level of the ESS. It is important that the impact of these ESS on near-IR absorption and heating rates should be assessed.…”

Section: Introductionmentioning

confidence: 82%

“…Its interaction with the Earth-atmosphere system, leads to its absorption by atmospheric gases and radiative heating of the atmosphere. This quantification of these processes requires knowledge of the extraterrestrial solar spectrum ESS [1]. In the near-IR, ESS with different absolute levels, resolutions and consequently different amount of solar energy available at the top-of-the-atmosphere (TOA), have been derived over the years.…”

Section: Introductionmentioning

confidence: 99%

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The effect of chosen extraterrestrial solar spectrum on clear-sky atmospheric absorption and heating rates in the near infrared

Menang¹,

Shine²

2013

AIP Conference Proceedings

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Abstract:The extraterrestrial solar spectrum (ESS) is an important component in near infrared (near-IR) radiative transfer calculations. However, the impact of a particular choice of the ESS in these regions has been given very little attention. A line-by-line (LBL) transfer model has been used to calculate the absorbed solar irradiance and solar heating rates in the near-IR from 2000-10000 cm -1 (1-5 µm) using different ESS. For overhead sun conditions in a mid-latitude summer atmosphere, the absorbed irradiances could differ by up to about 11 Wm −2 (8.2 %) while the tropospheric and stratospheric heating rates could differ by up to about 0.13 K day −1 (8.1 %) and 0.19 K day −1 (7.6 %). The spectral shape of the ESS also has a small but non-negligible impact on these factors in the near-IR.

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Section: Introductionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

The effect of chosen extraterrestrial solar spectrum on clear-sky atmospheric absorption and heating rates in the near infrared

Menang¹,

Shine²

2013

AIP Conference Proceedings

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“…In the rest of the paper, we concentrate on hydrogen escape, but we note that in the case of planets in close orbits around M-stars, in particular, our results are contingent on the presence of a sufficiently strong magnetic field to guard against direct loss of the primary atmospheric component. For F UV , between 10 and 120 nm we used the present-day "medium-activity" spectrum from Thuillier et al (2004). This was combined with wavelength-dependent expressions for evolution of the solar (G-class) XUV flux with time provided in Ribas et al (2005), with separate treatment for the Lyα peak at 121 nm.…”

Section: Evolution Of Atmospheric Compositionmentioning

confidence: 99%

WATER LOSS FROM TERRESTRIAL PLANETS WITH CO₂-RICH ATMOSPHERES

Wordsworth

Pierrehumbert

2013

ApJ

191

169

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Water photolysis and hydrogen loss from the upper atmospheres of terrestrial planets is of fundamental importance to climate evolution but remains poorly understood in general. Here we present a range of calculations we performed to study the dependence of water loss rates from terrestrial planets on a range of atmospheric and external parameters. We show that CO 2 can only cause significant water loss by increasing surface temperatures over a narrow range of conditions, with cooling of the middle and upper atmosphere acting as a bottleneck on escape in other circumstances. Around G-stars, efficient loss only occurs on planets with intermediate CO 2 atmospheric partial pressures (0.1-1 bar) that receive a net flux close to the critical runaway greenhouse limit. Because G-star total luminosity increases with time but X-ray and ultraviolet/ultravoilet luminosity decreases, this places strong limits on water loss for planets like Earth. In contrast, for a CO 2 -rich early Venus, diffusion limits on water loss are only important if clouds caused strong cooling, implying that scenarios where the planet never had surface liquid water are indeed plausible. Around M-stars, water loss is primarily a function of orbital distance, with planets that absorb less flux than ∼270 W m −2 (global mean) unlikely to lose more than one Earth ocean of H 2 O over their lifetimes unless they lose all their atmospheric N 2 /CO 2 early on. Because of the variability of H 2 O delivery during accretion, our results suggest that many "Earth-like" exoplanets in the habitable zone may have ocean-covered surfaces, stable CO 2 /H 2 O-rich atmospheres, and high mean surface temperatures.

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“…In this study, we use the recently published high-resolution solar reference spectrum by Chance and Kurucz (2010), which is radiometrically calibrated to an absolute solar reference spectrum from ATLAS shuttle flights measured at coarser spectral resolution (Thuillier et al, 2004). σ (λ) are the effective cross sections at instrument resolution.…”

Section: Data Analysis Algorithmmentioning

confidence: 99%

Characterization and verification of ACAM slit functions for trace-gas retrievals during the 2011 DISCOVER-AQ flight campaign

Liu

Kowalewski

et al. 2015

Atmos. Meas. Tech.

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Abstract. The Airborne Compact Atmospheric Mapper (ACAM), an ultraviolet/visible/near-infrared spectrometer, has been flown on board the NASA UC-12 aircraft during the Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) campaigns to provide remote sensing observations of tropospheric and boundary-layer pollutants from its radiance measurements. To assure the tracegas retrieval from ACAM measurements we perform detailed characterization and verification of ACAM slit functions. The wavelengths and slit functions of ACAM measurements are characterized for the air-quality channel ( ∼ 304-500 nm) through cross-correlation with a high-resolution solar irradiance reference spectrum after necessarily accounting for atmospheric gas absorption and the ring effect in the calibration process. The derived slit functions, assuming a hybrid combination of asymmetric Gaussian and top-hat slit functions, agree very well with the laboratory-measured slit functions. Comparisons of trace-gas retrievals between using derived and measured slit functions demonstrate that the crosscorrelation technique can be reliably used to characterize slit functions for trace-gas retrievals.

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Solar irradiance reference spectra

Cited by 78 publications

References 47 publications

The effect of chosen extraterrestrial solar spectrum on clear-sky atmospheric absorption and heating rates in the near infrared

The effect of chosen extraterrestrial solar spectrum on clear-sky atmospheric absorption and heating rates in the near infrared

WATER LOSS FROM TERRESTRIAL PLANETS WITH CO₂-RICH ATMOSPHERES

Characterization and verification of ACAM slit functions for trace-gas retrievals during the 2011 DISCOVER-AQ flight campaign

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Solar irradiance reference spectra

Cited by 78 publications

References 47 publications

The effect of chosen extraterrestrial solar spectrum on clear-sky atmospheric absorption and heating rates in the near infrared

The effect of chosen extraterrestrial solar spectrum on clear-sky atmospheric absorption and heating rates in the near infrared

WATER LOSS FROM TERRESTRIAL PLANETS WITH CO2-RICH ATMOSPHERES

Characterization and verification of ACAM slit functions for trace-gas retrievals during the 2011 DISCOVER-AQ flight campaign

Contact Info

Product

Resources

About

WATER LOSS FROM TERRESTRIAL PLANETS WITH CO₂-RICH ATMOSPHERES