Sea
ice data prior to the satellite data is severely lacking, such that these types of attempts are used to recreate the extent of the sea ice as best we can.
Not exact matches
This ongoing
ice retreat is spawning a variety of changes in the Arctic ecosystem, from increased parasites in caribou herds to a growth in annual tundra fires in Alaska, according to the assessment in Science last week, which reviews
prior data.
New
data indicate that substantial areas throughout westernmost Canada were
ice free
prior to 12.5 ka and some as early as 14.0 ka, with implications for climate dynamics and the timing of meltwater discharge to the Pacific and Arctic oceans.
The
Ice Core
data report natural (pre-human) cycles of temperature and CO2 that go way above and below anything experienced in human history
prior to or during the industrial age.
On July 23, I wrote about the rocky rollout,
prior to peer review, of «
Ice Melt, Sea Level Rise and Superstorms: Evidence from Paleoclimate
Data, Climate Modeling, and Modern Observations that 2 °C Global Warming is Highly Dangerous.»
This one at least is consistent with other
data, like the rapid decline of Arctic sea
ice, way ahead of any model predictions I've seen published
prior to the decline.
The
ice data identifies that temperature rises
prior to CO2 values by some considerable time.
Prior to 1978, satellite measurements of sea
ice extent are not available and the
data is much less reliable.
Prior to that we must rely on
ice core
data.
Monthly anomalies of Southern Hemisphere sea
ice extent (left panel) and area (right panel) derived using the newly enhanced SB2
data (black) of Comiso et al. and the older SBA
data (red)
prior to the enhancements made by Comiso et al..
CO2
data from
Ice Cores is correct because it shows CO2 levels
prior to industrialization were low.