[Forum SIS] Seminario a Dalmine BG

[Alessandro Fasso']

Avviso di Seminario

Il Dott. Fabio Madonna, CNR-IMAA


terrà un seminario da titolo

*Quantifying the value of complementary observations for the
characterization of atmospheric humidity from the surface to the
stratosphere.*

*
*

Lunedì 30 gennaio 2012, ore 10.00
Aula 21, Dipartimento di Ingegneria dell'Informazione e Metodi Matematici
Via Marconi 5, Dalmine BG



*Abstract*

GRUAN (GCOS Reference Upper Air Network) has the aim to characterize the
thermodynamic state of atmosphere using both in-situ and remote observation
techniques. GRUAN backbone is represented by 15 highly instrumented
observatories with a strong observing capability equipped with GPS, lidars,
radiometers, spectrometers, radars. So far, the contribution of ground
based remote sensing has been identified as a priority in the frame of
GRUAN for providing reference-quality profiling and columnar observations
of atmospheric essential climate variables, in particular temperature and
water vapour, from the surface into the stratosphere, to enhance the
monitoring and the understanding of climate variability and change.

To this aim, GATNDOR (GRUAN Analysis Team for Network Design and Operations
Research), a research team supporting the development and implementation of
GRUAN on scientifically sound foundations, is working for providing a
quantification of the value of the so-called “complementary observations”,
identified as ground based remote sensing techniques available at GRUAN
sites.

This research aims at estimating uncertainty of vertical profiles of both
temperature and moisture using data from highly-instrumented GRUAN sites
(e.g., ARM site, Beltsville, Cabauw, Lindenberg, Potenza) and to quantify
the error reduction resulting from increasing redundancy of measurements.
This requires the assessment of the uncertainty of the temperature and
moisture vertical profiles retrieved using each of the considered
techniques and then the investigation of possible sensors’ synergies to
reduce the uncertainty.

The aim of the investigation is the provision of recommendations for an
optimal observation strategy related to GRUAN phase 1 and 2, increasing
accuracy of measured parameters and reducing uncertainties through
redundancy. Moreover, recommendations for the equipment to operate/acquire
at the GRUAN sites will be also provided.

Here, results obtained in the frame of this topic will be presented. In
particular a preliminary assessment of value of complementary observations
will be provided showing what are the real advantages in estimating
humidity, along with its uncertainty, from the combination of radiosondes
and ground based remote sensing techniques respect to the use of
radiosondes only.

-- 
________________________________________
Alessandro Fassò
Professor of Statistics
Head of DIIMM, Dept. of Information Technology and Mathematical Methods
University of Bergamo
Via Marconi 5,   24044 Dalmine BG I,   Italy

*Office*:  Cell.  +39 338 655 1631 tel.  +39 035 2052 323,   fax. +39 035
2052 310
*Personal* *fax*. +39 035 7423 1165
email: alessandro.fasso at unibg.it,
homepage:  www.unibg.it/pers/?alessandro.fasso
*Skype*: alessandro.fasso
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.stat.unipg.it/pipermail/sis/attachments/20120124/326ef56f/attachment-0001.html>