Sentences with word «irradiance»
Irradiance refers to the amount of light energy or power that falls on a particular surface per unit area. It basically measures how much light is hitting a specific location at a given moment. Full definition
Krivova, N. A., Solanki, S. K., Fligge, A. & Unruh, Y. C. Reconstruction of solar irradiance variations in cycle 23: is solar surface magnetism the cause?
nature.com
Harder, J. W., Fontenla, J. M., Pilewskie, P., Richard, E. C. & Woods, T. N. Trends in solar spectral irradiance variability in the visible and infrared.
The solar UV irradiance from the thermosphere of Saturn and the solar wind are the most probable sources to account for the long - term variability of the electron radiation belts (Roussos et al. 2014), suggesting that external drivers play indeed an important role in Saturn's magnetospheric dynamics.
Estimated increases since 1675 are 0.7 %, 0.2 % and 0.07 % in broad ultraviolet, visible / near infrared and infrared spectral bands, with a total irradiance increase of 0.2 %.
Evaluation of WRF Model - derived Direct Irradiance for Solar Thermal Resource Assessment over South Korea
The effect of solar UV irradiance variations on the Earth's atmosphere.
One of the problems with irradiance as a driver for climate change is that though the changes seem to be fairly well correlated with the temperature anomaly, many scientists think the magnitude is too small to totally account for temperature changes.
We presented a new technique to reconstruct the total and spectral solar irradiance over the Holocene.
«Spatial variability of surface irradiance measurements at the Manus ARM site.»
Facts: It's not the sun («According to PMOD at the World Radiation Center there has been no increase in solar irradiance since at least 1978 when satellite observations began.
Generating 1 - Minute Temporal Resolution Solar Direct Normal Irradiance Series from Hourly Series
The symbionts residing closer to the surface may be better adapted to high irradiance by making proteins that protect against too much ultra violet light or by modifying their photosystem.
Electricity price estimates are sourced from the Energy Information Administration and solar production estimates are based on irradiance data from NASA.
Daily measurements of the solar spectrum between 0.2 µm and 2.4 µm, made by the Spectral Irradiance Monitor (SIM) instrument on the Solar Radiation and Climate Experiment (SORCE) satellite3 since April 2004, have revealed4 that over this declining phase of the solar cycle there was a four to six times larger decline in ultraviolet than would have been predicted on the basis of our previous understanding.
On the other hand, chromospheric indices and hence solar UV irradiance do not exhibit a similar change.
As expected, the southern roof face — which was selected for the site's current solar array — has slightly higher irradiance with solar access values of approximately 95 % across much of the surface.
«A new absolute reference for atmospheric longwave irradiance measurements with traceability to SI units.»
While the link between solar irradiance levels and warming is pretty straight forward, the cosmic ray cloud formation proposition is still in its infancy.
There are issues with the total irradiance reconstructions.
For the period after 1974, the model makes use of the full - disc magnetograms of the Sun and reproduces up to 97 % of the measured irradiance variation.
The colors in the map show the local solar irradiance averaged over three years from 1991 to 1993 (24 hours a day) taking into account the cloud coverage available from weather satellites.»
Estimation of the downward longwave irradiance reaching the Earth surface derived from SEVIRI data on board the geostationary satellite Meteosat.
The quiet Sun is a combination of different brightness components and the evolution of their fractional contributions drives its activity and long - term irradiance variability.
When we look at a solar irradiance map of the world, it's no wonder all eyes are focused on the arid deserts of North Africa.
ECMWF's Global and Direct Normal Irradiance Forecasts — An Accuracy Assessment Taking the New MACC Aerosol Forecasts into Account
The bottom line is that Wilson was not suggesting that solar activity is responsible for more warming than we think, or greenhouse gases less, but merely asking the question «what if models weight solar irradiance more strongly?»