GS - Layout - Part1
GS - Layout - Part1
GS - Layout - Part1
AND IT EFFECTS
ON THE WORLD
PETER WADHAMS
Politecnico di Torino
University of Cambridge
This is a huge
contrast to the
natural cycle of
low values (180
ppm) during an ice
age and higher but
still moderate
values (280 ppm)
during an
interglacial (in
fact until the
20th Century)
MEDIAN LIMITS OF SEA ICE IN SUMMER AND WINTER 1972-2007
SEA ICE + LAND ICE: SIMILAR BUT DIFFERENT
THE EARTH HAS BEEN WARMING RAPIDLY FROM THE MIDDLE OF
THE 19THCENTURY
THERMAL RADIATION IN THE INFRA-RED OBSERVED FROM A
SATELLITE ABOVE MEDITERRANEAN
From 8 to 14 micrometres
atmosphere (in absence of
clouds)is mainly transparent
apart from ozone absorption
band at 9.5 – 10, a «window
region». Superimposed are
black body radiation curves
for 7, -13, -33, -53°C.
Units of radiance are w per sq
m per steradian per wave
number.
THE RISE IN AIR TEMPERATURE IS ACCELERATING