[ExI] Sea level rise (was: Curves on a graph (was Re:RichardLindzen on climatehysteria))

Mirco Romanato painlord2k at libero.it
Fri Aug 7 08:05:23 UTC 2009

BillK ha scritto:
> On 8/6/09, Tomaz Kristan wrote:
>> What superriver fils the Ocean, Alfio?

> Quote:

> Global sea level is currently rising as a result of both ocean thermal
> expansion and glacier melt, with each accounting for about half of the
> observed sea level rise, and each caused by recent increases in global
> mean temperature. For the period 1961-2003, the observed sea level
> rise due to thermal expansion was 0.42 millimeters per year and 0.69
> millimeters per year due to total glacier melt (small glaciers, ice
> caps, ice sheets) (IPCC 2007). Between 1993 and 2003, the contribution
> to sea level rise increased for both sources to 1.60 millimeters per
> year and 1.19 millimeters per year respectively (IPCC 2007).

How much trust able is the IPCC 2007 data?
What researches they cite for these data? Are they available? The raw
data of these researches is available? There are other researches that
confirm or deny these data?

> However, current
> estimates indicate that mass balance for the Antarctic ice sheet is in
> approximate equilibrium and may represent only about 10 percent of the
> current contribution to sea level rise coming from glaciers.

So, it is around 0.16 mm per year for Antarctica only. 90% the rest of
the glaciers are

> However,
> some localized areas of the Antarctic have recently shown significant
> negative balance, e.g., Pine Island and Thwaites Glaciers, and
> glaciers on the Antarctic Peninsula.

The localized areas are of not interest in the global balance of water.
In fact, appear that "Antarctic Sea Ice Up 4.7% Since 1980"

> There is still much uncertainty
> about accumulation rates in Antarctica, especially on the East
> Antarctic Plateau.

> The Greenland Ice Sheet may be contributing about
> 30 percent of all glacier melt to rising sea level. Furthermore,
> recent observations show evidence for increased ice flow rates in some
> regions of the Greenland Ice Sheet, suggesting that ice dynamics may
> be a key factor in the response of coastal glaciers and ice sheets to
> climate change and their role in sea level rise.

Recent observations?

New Study Finds Greenland Ice Melt 'not changing' or 'dropping'

> In contrast to the polar regions, the network of lower latitude small
> glaciers and ice caps, although making up only about four percent of
> the total land ice area or about 760,000 square kilometers, may have
> provided as much as 60 percent of the total glacier contribution to
> sea level change since 1990s (Meier et al., 2007).

Glaciers in Norway Growing Again

Alaska’s ice thickens over unusual summer

California Glaciers Growing …


More information about the extropy-chat mailing list