seminari corsi meteorologia
Environmental Meteorology Seminar: Marcello Petitta

Giovedì 5 Maggio alle ore 14:30 presso il Dipartimento di Ingegneria Civile, Ambientale e Meccanica dell’ Università di Trento (Aula 1P) si terrà il seminario: “Here comes the sun”: predicting weather and climate for industrial and commercial applications.

Il seminario, tenuto da Marcello Petitta (Università di Roma Tor Vergata), potrà essere seguito anche in streaming:
Meeting ID: 853 3358 1263
Passcode: 971493

Ever since radio and TV have become widespread, weather forecasting has
been one of the ever-present services. Nowadays, there are various
weather forecast apps on mobile phones and computers and we all look at
weather forecasts to plan our days and weeks. At the same time, weather
forecasts on short timescales (up to seven days) have important
commercial applications for various sectors such as energy, water,
agriculture, sports and insurance, and specialised companies and
services are active in this market.

On timescales longer than a week, weather forecasts are no longer
useful, but new climate services for commercial activities and industry
now provide information and forecasts on monthly, seasonal and decadal
timescales. These services are relatively new, and a number of companies
and institutions are working to provide commercial climate services for
a variety of industries.
In this presentation we will focus on the role of researchers in
providing and communicating weather and climate forecast information for
commercial and industrial use. Examples of climate services in the
energy, water, agriculture and insurance sectors will be presented. The
role of forecast uncertainties will be discussed and suggestions made on
how to communicate these uncertainties. Finally, the role of artificial
intelligence and machine learning methods for climate and weather
forecasting will be analysed and practical examples of their use will be
seminari corsi meteorologia
Environmental Meteorology Seminar: Casey Patrizio

Giovedì 28 Aprile alle ore 14:30 presso il Dipartimento di Ingegneria Civile, Ambientale e Meccanica dell’ Università di Trento si terrà il seminario: “Understanding the Role of Midlatitude Ocean Dynamics in Climate Variability”.

Il seminario, tenuto da Casey Patrizio (CMCC), potrà essere seguito anche in streaming:
Meeting ID: 810 1831 2870
Passcode: 161522

The ocean plays a key role in regulating Earth’s mean climate, both
because of its massive heat capacity, but also its heat transport via
its slow-moving overturning circulations and other dynamics. In
principle, fluctuations in such ocean heat transport can influence the
variability of the climate, first by impacting the sea-surface
temperature (SST) variability and in turn the atmospheric variability
through air-sea heat flux exchange.  However, the role of ocean dynamics
in driving climate variability is incompletely understood, particularly
in the extratropics.
In the first part of the seminar,  the role of ocean dynamics in
midlatitude SST variability is explored using two different
configurations of Hasselmann’s stochastic climate model. It is shown
that the model driven only by the observed surface heat fluxes generally
produces midlatitude SST power spectra that are too red compared to
observations. Including observed estimates of oceanic forcing and
damping in the model reduces this discrepancy by whitening the
midlatitude SST spectra. It is also shown that the whitening of
midlatitude SST variability by ocean processes operates in NCAR's
Community Earth System Model (CESM).
In the second part, the atmospheric response to midlatitude ocean-forced
SST anomalies is explored using the simple model developed in the first
part. The model is first used to isolate the oceanic and
atmospheric-forced components of the observed SST variability in the
Kuroshio-Oyashio Extension (KOE) region. The associated atmospheric
circulation anomalies are then diagnosed by lagged-regression of monthly
sea-level pressure (SLP) anomalies onto the KOE- averaged SST anomalies,
and their oceanic and atmospheric-forced components. It is shown that a
large-scale SLP pattern is linked the oceanic-forced component of the
SST variability, but not the atmospheric-forced component.