George Varlas

20 Questions 15 Answers 0 Followers

Questions related from George Varlas

Which are the dynamical mechanisms of Junge Layer impact on Climate Change?

While searching for cosmic dust and debris from nuclear bomb tests, Christian Junge discovered in 1960 a layer of microscopic aerosol particles between the tropopause and about 18 miles (30 km)...

12 December 2016 3,481 5 View

What is the impact of sea salt aerosols, as condensation and icing nuclei, on the climatic processes?

Sea salt aerosol, which originally comes from sea spray, is one of the most widely distributed natural aerosols. Sea salt aerosols are characterized as non-light-absorbing, highly hygroscopic, and...

09 September 2016 9,678 9 View

Which is the impact of cosmic rays on cloud formation and climate change?

Cosmic rays have a slight interaction with clouds. How much significant is that interaction? Can that interaction change the energy budget of Earth and the dynamical processes which interact with...

12 December 2015 5,636 6 View

What is the impact of the interaction between oceans and greenhouse gases on the climate change? What will be the climate forcings in the future?

Air-sea gas exchange is a physio-chemical process, primarily controlled by the air-sea difference in gas concentrations and the exchange coefficient, which determines how quickly a molecule of gas...

12 December 2015 6,330 12 View

How can I change the elevation of some points in e.g. USGS DEM?

The USGS Digital Elevation Model (DEM) data files are digital representations of cartographic information in a raster form. DEMs consist of a sampled array of elevations for a number of ground...

12 December 2015 1,890 6 View

Are there reliability estimations for the CMIP5 climate models?

Can we assess the errors and the statistical significance of the CMIP5 future climate projections?

07 July 2015 7,386 9 View

What will be the impact of Climate Change on Upper-Air temperature?

Warm or cold scenarios are predicted about Upper-Air?

06 June 2015 4,584 7 View

Is a rise in sea level around the Antarctica able to affect Mediterranean Sea?

The ice around the edge of Antarctica is melting faster than previously thought, potentially unlocking metres of sea-level rise in the long-term, researchers have warned. A team of US scientists...

03 March 2015 2,235 8 View

Is CO2 increasing at all the levels of troposphere? If yes, in which way the global warming is affected by the different temperature of CO2 layers?

In climate change/global warming studies, the Stefan Boltzmann formula is often used to estimate the amount of radiant energy which escapes outward into outer space from earth. The formula is...

01 January 2015 1,236 24 View

Which combination of parameterization schemes in WRF-ARW model is the best to study storms?

In ARW the default schemes in namelist.input for e.g. physics are: mp_physics = 3, 3, 3, ra_lw_physics = 1, 1, 1, ra_sw_physics = 1, 1, 1, radt = 30, 30, 30, sf_sfclay_physics = 1, 1,...

12 December 2014 8,059 4 View

ECMWF or GFS meteorological data are better?

ECMWF and GFS global analysis and re-analysis data are often used in many studies and operational activities. Nevertheless, ECMWF or GFS data are better?

12 December 2014 4,543 1 View

Which are the main factors for a possible increase of hurricane activity due to the climate change?

Observed records of Atlantic hurricane activity (e.g. Emanuel, 2007) show a strong correlation, on multi-year time-scales, between local tropical Atlantic sea surface temperatures (SSTs) and the...

08 August 2014 6,788 14 View

Will we be able to use smartphone sensed data for assimilation in weather models or in other assimilation systems such as road traffic models?

Surface Pressure Observations from Smartphones. A Potential Revolution for High-Resolution Weather Prediction? http://journals.ametsoc.org/doi/pdf/10.1175/BAMS-D-13-00188.1 An adaptive observation...

07 July 2014 1,663 1 View

How significant is the uncertainty in climate sensitivity estimates on climate modelling?

Climate sensitivity is the equilibrium temperature change in response to changes of the radiative forcing. Therefore climate sensitivity depends on the initial climate state, but potentially can...

07 July 2014 9,688 17 View

Are snowflakes based on fractal geometry?

A snowflake is either a single ice crystal or an aggregation of ice crystals which falls through the Earth's atmosphere. They begin as snow crystals which develop when microscopic supercooled...

07 July 2014 3,606 7 View

What is the impact of cosmic rays on the cloud formation?

Cosmic rays are immensely high-energy radiation, mainly originating outside the solar system. They may produce showers of secondary particles that penetrate and impact the Earth's atmosphere and...

06 June 2014 7,738 11 View

How MATLAB can open netcdf, grib1 and grib2 files?

Similarly to NCL, are there simple routines opening netcdf, grib1, and grib2 files in MATLAB?

06 June 2014 945 6 View

Is the WRF-Hydro model useful to predict floods?

The WRF-Hydro system was originally designed as a model coupling framework designed to facilitate easier coupling between the Weather Research and Forecasting model and components of terrestrial...

06 June 2014 609 17 View

As far as global warming is concerned, is the ocean warming leading to atmospheric warming or the opposite?

A warmer ocean can exclude significant amount of CO2 to the atmosphere. It indicates a positive forcing factor to the global warming scenarios.

06 June 2014 2,153 17 View

How the Mpemba effect is explained?

The Mpemba effect, named after Erasto Mpemba, is the observation that, in some circumstances, warmer water can freeze faster than colder water. Although there is evidence of the effect, there is...

06 June 2014 4,834 3 View