Significant loss of glaciers in Central Asia began around the 1930s, and become more dramatic in the second half of the 20th century and continue into the 21st century. Glacier area was reduced in the Tien Shan and in the Pamirs, including its largest Fedchenko Glacier. The debris-covered glacier tongue retreated by more than 1 km since 1933 and lowered by about 50 m since 1980.
Coastal and island tide-gauge data show that sea level rose by just under 20 cm between 1870 and 2001, with an average rise of 1.7 mm per year during the 20th century and with an increase in the rate of rise over this period. This is consistent with the geological data and the few long records of sea level from coastal tide gauges. From 1993 to the end of 2006, near-global measurements of sea level (between 65｡N and 65｡S) made by high precision satellite altimeters indicate global average sea level has been rising at 3.1 ｱ 0.4 mm per year.
Brainstorm a list of how this might effect Minnesotans. Be sure to include wildlife, tourism/recreation, agriculture, and human health.
Atmospheric CO2 has increased from a pre-industrial concentration of about 280 ppmv to about 367 ppmv at present (ppmv= parts per million by volume). CO2 concentration data from before 1958 are from ice core measurements taken in Antarctica and from 1958 onwards are from the Mauna Loa measurement site. The smooth curve is based on a hundred year running mean. It is evident that the rapid increase in CO2 concentrations has been occurring since the onset of industrialization. The increase has closely followed the increase in CO2 emissions from fossil fuels.
Global Warming 101, Grades 3-6 (2013 Version)
What is climate change and
why is it happening?
Questions I hope to answer…
1. What is the difference between the greenhouse
effect, climate change and global warming?
2. What proof do we have that climate change is
3. Why is it happening?
The Greenhouse Effect
The Earth is
surrounded by a
thin layer of gasses
we call greenhouse
gases are what
make up our
What does “average” mean?
• Climate is the average
• Global warming refers
to an increase in the
Shrinking of Fedchenko
Glacier in Tajikistan
Source: Photo: V. Novikov (taken in summer
2006); data from the Tajik Agency on
Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.orgNWF/2007
Source: Church, J.A. and White, N.J. (2006). A 20th century acceleration
in global sea-level rise. Geophysical Research Letters, 33, L01602
Climate Change in the Midwest
• Temperatures are rising, especially in winter.
• Extreme rainfall events (24-hr and 7-day) are
• Winters are shorter.
• Lake ice melts earlier, especially
on smaller lakes.
Source: Great Lakes Report, Union of Concerned Scientists
Thank you to the National Wildlife Federation for giving permission to
use slides from Climate Classroom.
Hickey, Laura. (2007). Whats up with global warming? Retrieved,
October 10, 2007, from www.climateclassroom.org, www.nwf.org.
The Great Lakes report, as well as other regional reports, can be
downloaded from the Union of Concerned Scientist website at:
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