Sentences with phrase «thickness records each year»

Not exact matches

This year, scientists recorded the minimum thickness of the ozone layer at 101 Dobson units on October 4, 2015, as compared to 250 - 350 Dobson units during the 1960s, before the Antarctic ozone hole occurred.

Scientists also found that the minimum thickness of ozone layer this year was recorded at 114 Dobson units on Sept. 30, compared to 250 - 350 Dobson units during the 1960s.

«We painstakingly measured the thickness of each annual growth ring in five stalagmites taken from the cave, including one that provides a continuous annual record spanning more than 1800 years,» says Baker.

Sea ice volume measurements, which take ice thickness into account, also hit a record low this year.

By measuring the density and thickness of the rings, one can create a record going back about a thousand years of tree growth.

Sea ice volume measurements, which take ice thickness into account, also hit a record low this year.

Aspin et al., 4.0, Heuristic Sea ice extent is greater on 05 June 2013 than a year ago, however ice thicknesses and volumes are, on average, the lowest on record.

Reasoning for a decrease in sea ice extent from recent years, perhaps approaching new record - low minimum, focuses on the below - normal sea ice thickness overall, the thinning of sea ice in coastal seas, rotting of old multi-year sea ice, warm temperatures in April and May 2010, and the rapid loss of sea ice area seen during May.

Add in the fact that the thickness of the ice, which is much harder to measure, is estimated to have fallen by half since 1979, when satellite records began, and there is probably less ice floating on the Arctic Ocean now than at any time since a particularly warm period 8,000 years ago, soon after the last ice age.

Going back even farther, I. V. Polyakov and others examined Russian historical records of Arctic sea ice extent and thickness starting from the year 1900.

The Canadian Ice Service notes: The reduced overall sea ice thicknesses and the greater proportion of seasonal (first - year) ice were the primary reasons for this year's record - breaking minimum.

Scientists who made coring tests off Barrow in Alaska — which recorded the earliest ever spring melt in 78 years of record - keeping − report that where they would have expected thicknesses of up to 150 centimetres, they were recording depths of only 80 to 100 cm.

«The current rate of sea ice loss, and the reduced thickness of large areas of the ice remaining, suggests that we may see yet another record minimum in summer sea ice extent this year.»

In addition, records from Russian coastal stations show the extent and thickness of sea ice has varied greatly over 60 - to 80 - year periods during the last 125 years.

The team established a group of un-manned scientific platforms, collectively called an observatory, to record data throughout the remainder of the year on everything from the salinity of the water to the thickness and temperature of the ice cover.