TSI and TOR measurements with CLARA onboard NorSat-1

2021 ◽  
Author(s):  
Margit Haberreiter ◽  
Wolfgang Finsterle ◽  
Jean-Philippe Montillet ◽  
Benjamin Walter ◽  
Bo Andersen ◽  
...  
Keyword(s):  
Global Climate ◽  
Total Solar Irradiance ◽  
Radiation Budget ◽  
Climate Variables ◽  
The Earth ◽  
The World ◽  
Night Side ◽  
Earth Radiation Budget ◽  
First Time ◽  
Earth Radiation

<p>Total Solar Irradiance (TSI) is one of the Essential Climate Variables (ECV) identified by the World Meteorological Organization's Global Climate System (GCOS). The Compact Lightweight Absolute RAdiometer (CLARA) experiment onboard the Norwegian micro satellite NorSat-1 is a SI traceable radiometer and was launched July 14, 2017 with the primary science goal to measure TSI from space. We present the latest status of the data and degradation correction obtained with this SI-traceable radiometer. Besides TSI, CLARA also measures the total outgoing radiation (TOR) at the top of the Earth atmosphere on the night side of Earth, which is extremely important to understand the Earth Radiation Budget. It is to our knowledge the first time that TSI and the emitted radiation from Earth are measured simultaneously with one SI-traceable absolute radiometer. We will compare the CLARA TSI and TOR time series with other available datasets. Ultimately, we aim towards determining the Earth Energy Imbalance from space. We will discuss the achievements and limitations in direction of this goal.</p>

Ground and in-flight calibrations of the Earth Radiation Budget Experiment nonscanning radiometers

1990 ◽  
Author(s):  
Jack Paden ◽  
Dhirendra K. Pandey ◽  
Robert S. Wilson ◽  
Susan Thomas ◽  
Michael A. Gibson ◽  
...  
Keyword(s):  
Radiation Budget ◽  
The Earth ◽  
Earth Radiation Budget ◽  
Earth Radiation

The impact of cloud inhomogeneities on the Earth radiation budget: the 14 October 1989 I.C.E. convective cloud case study

1994 ◽  
Vol 12 (2/3) ◽  
pp. 240-253 ◽  
Author(s):  
F. Parol ◽  
J. C. Buriez ◽  
D. Crétel ◽  
Y. Fouquart
Keyword(s):  
Aspect Ratio ◽  
Water Content ◽  
Liquid Water ◽  
Convective Cloud ◽  
Liquid Water Content ◽  
Radiation Budget ◽  
The Earth ◽  
Earth Radiation Budget ◽  
The Impact ◽  
Earth Radiation

Abstract. Through their multiple interactions with radiation, clouds have an important impact on the climate. Nonetheless, the simulation of clouds in climate models is still coarse. The present evolution of modeling tends to a more realistic representation of the liquid water content; thus the problem of its subgrid scale distribution is crucial. For a convective cloud field observed during ICE 89, Landsat TM data (resolution: 30m) have been analyzed in order to quantify the respective influences of both the horizontal distribution of liquid water content and cloud shape on the Earth radiation budget. The cloud field was found to be rather well-represented by a stochastic distribution of hemi-ellipsoidal clouds whose horizontal aspect ratio is close to 2 and whose vertical aspect ratio decreases as the cloud cell area increases. For that particular cloud field, neglecting the influence of the cloud shape leads to an over-estimate of the outgoing longwave flux; in the shortwave, it leads to an over-estimate of the reflected flux for high solar elevations but strongly depends on cloud cell orientations for low elevations. On the other hand, neglecting the influence of cloud size distribution leads to systematic over-estimate of their impact on the shortwave radiation whereas the effect is close to zero in the thermal range. The overall effect of the heterogeneities is estimated to be of the order of 10 W m-2 for the conditions of that Landsat picture (solar zenith angle 65°, cloud cover 70%); it might reach 40 W m-2 for an overhead sun and overcast cloud conditions.

History of satellite missions and measurements of the Earth Radiation Budget (1957–1984)

1986 ◽  
Vol 24 (2) ◽  
pp. 357 ◽  
Author(s):  
Frederick B. House ◽  
Arnold Gruber ◽  
Garry E. Hunt ◽  
Ann T. Mecherikunnel
Keyword(s):  
Radiation Budget ◽  
The Earth ◽  
History Of ◽  
Earth Radiation Budget ◽  
Satellite Missions ◽  
Earth Radiation

scholarly journals Decadal solar effects on temperature and ozone in the tropical stratosphere

2006 ◽  
Vol 24 (8) ◽  
pp. 2091-2103 ◽  
Author(s):  
S. Fadnavis ◽  
G. Beig
Keyword(s):  
Lower Stratosphere ◽  
Middle Atmosphere ◽  
Stratospheric Aerosol ◽  
Radiation Budget ◽  
Atmospheric Research ◽  
The Earth ◽  
Earth Radiation Budget ◽  
Earth Radiation ◽  
Good Agreement ◽  
Middle Stratosphere

Abstract. To investigate the effects of decadal solar variability on ozone and temperature in the tropical stratosphere, along with interconnections to other features of the middle atmosphere, simultaneous data obtained from the Halogen Occultation Experiment (HALOE) aboard the Upper Atmospheric Research Satellite (UARS) and the Stratospheric Aerosol and Gas Experiment II (SAGE II) aboard the Earth Radiation Budget Satellite (ERBS) during the period 1992–2004 have been analyzed using a multifunctional regression model. In general, responses of solar signal on temperature and ozone profiles show good agreement for HALOE and SAGE~II measurements. The inferred annual-mean solar effect on temperature is found to be positive in the lower stratosphere (max 1.2±0.5 K / 100 sfu) and near stratopause, while negative in the middle stratosphere. The inferred solar effect on ozone is found to be significant in most of the stratosphere (2±1.1–4±1.6% / 100 sfu). These observed results are in reasonable agreement with model simulations. Solar signals in ozone and temperature are in phase in the lower stratosphere and they are out of phase in the upper stratosphere. These inferred solar effects on ozone and temperature are found to vary dramatically during some months, at least in some altitude regions. Solar effects on temperature are found to be negative from August to March between 9 mb–3 mb pressure levels while solar effects on ozone are maximum during January–March near 10 mb in the Northern Hemisphere and 5 mb–7 mb in the Southern Hemisphere.

scholarly journals Use of a GCM to explore sampling issues in connection with satellite remote sensing of the Earth radiation budget

2000 ◽  
Vol 105 (D16) ◽  
pp. 20757-20772 ◽  
Author(s):  
Laura D. Fowler ◽  
Bruce A. Wielicki ◽  
David A. Randall ◽  
Mark D. Branson ◽  
Gary G. Gibson ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Satellite Remote Sensing ◽  
Radiation Budget ◽  
The Earth ◽  
Earth Radiation Budget ◽  
Earth Radiation

Satellite validation of GCM-simulated annual cycle of the earth radiation budget and cloud forcing

1992 ◽  
Vol 97 (D16) ◽  
pp. 18061 ◽  
Author(s):  
Sandrine Bony ◽  
Hervé Le Treut ◽  
Jean-Philippe Duvel ◽  
Robert S. Kandel
Keyword(s):  
Annual Cycle ◽  
Radiation Budget ◽  
Cloud Forcing ◽  
Satellite Validation ◽  
The Earth ◽  
Earth Radiation Budget ◽  
Earth Radiation

Magnetometer-only attitude and rate estimates during the Earth Radiation Budget Satellite 1987 control anomaly

1997 ◽  
Author(s):  
M. Challa ◽  
S. Kotaru ◽  
G. Natanson ◽  
M. Challa ◽  
S. Kotaru ◽  
...  
Keyword(s):  
Radiation Budget ◽  
The Earth ◽  
Earth Radiation Budget ◽  
Earth Radiation
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