The word
"calving" refers to the process of a large chunk or mass of ice breaking off from a glacier or ice shelf and falling into the ocean.
Full definition
A new study has found that the massive Laurentide ice sheet that covered Canada during the last ice age initially began shrinking through
calving of icebergs, and then abruptly shifted into a new regime where melting on the continent took precedence, ultimately leading to the sheet's demise.
Historic photos and maps (from the 1800's to present) indicate a long term retreat of ice
calving fronts on Greenland's glaciers.
«If an ice shelf loses contact with the ice rise, either through sustained thinning or a large
iceberg calving event, it can prompt a significant acceleration in ice speed, and possibly further destabilisation.
If there were truly an increase in glacier
calving events (due to warming or any other cause), the best evidence would be an increase in iceberg numbers starting in 1900 for example.
Immense craggy mountain ranges erupt straight up from colossal boulder fields, vast rivers of
ice calve into deep blue lakes, and its intricate coastline is strewn with uncharted fiords and inlets.
Historical data show that whale numbers are concentrated in particular areas of the US East Coast at certain times, such as
calving season.
The gray whale
calving lagoons gained acclaim in the early 1970s when a gray whale made contact with a local fisherman, allowing him to pat her head.
Can a rising sea level can act as a boost for glaciers
calving into the sea and trigger a surge of ice into the oceans?
However, this is balanced by substantial ice sheet losses on margins especially in West Antarctica
as calving rates accelerate.
Researchers knew that the reindeer spent their summers in
calving grounds in the north and migrated south to spend the winter in a bit more hospitable territory.
They lose mass
by calving icebergs, and basal melting towards their outer margins, along with sublimation and wind drift on their surfaces.
A
large calving event at the Zachariae glacier made the news in May 2013, and Khan and his team witnessed and filmed a similar event in July.
He'd been using the torch on his iPhone while assisting a cow
during calving during a dark and stormy night (a likely story).
A new study shows how huge influxes of fresh water into the North Atlantic Ocean from icebergs
calving off North America during the last ice age had an unexpected effect — they increased the production of methane in the tropical wetlands.
Increased basal melting also
increases calving of the floating ice shelf and the loss of buttressing power that inhibits the glaciers» seaward flow.
The two
whale calving lagoons are the World's most important place for the reproduction of the once - endangered North Pacific Gray Whale.
This whale population, hunted nearly to extinction generations ago, is slowly recovering, with an estimated 450 right whales dividing their time between winter
calving areas off the southeastern United States and summer feeding grounds from New England north.
In addition, the existence of historical
calving ground on Taiwan and Penghu Islands (with some fossil records [84] and captures [85]-RRB-, and any presence in other areas outside of the known ranges off Babuyan Islands in Philippines and coastal Vietnamese waters in Gulf of Tonkin are unknown.
The ice shelf currently loses around 62.3 ± 5 Gigatonnes per year of ice
through calving, and loses 101.2 ± 8 Gigatonnes per year through basal melting24.
A giant rift, part of a natural
calving process, has recently formed on the ice shelf.
WIDENING GULF A Delaware - sized iceberg
calved when a crack in the Larsen C ice shelf reached the Weddell Sea this year.
This makes it difficult for a large
calving retreat of the glacier to occur and extend inland.
It's vital we achieve this or we are likely to see
more calving of large ice shelves, similar to the recent Larsen C event.»
Locality of gray whale
calving site of Tojahui / Yavaros, Sonora.
Higher
calving flux indicates higher velocities (Van Den Broecke et al, 2009).
To provide adequate time for antibodies to reach their maximum level in the dam and to be transferred to the colostrum while at peak blood levels, I recommend administering ScourGuard ® 4K or ScourGuard4KC about six weeks
before calving.
An effective way to protect whales and coastal communities offering whale watching is to create sanctuaries — areas that provide safe refuge for whales during critical feeding, breeding and
calving times.
However, note that the last time, the
berg calved later in the summer (August), and this crack is much farther up the glacier than usually seen.
As the ice thins, the ice shelf connection with the pinpoints becomes more tenuous and more prone to retreat
via calving.
«In the ensuing months and years, the ice shelf could either gradually regrow, or may suffer
further calving events which may eventually lead to collapse — opinions in the scientific community are divided.
Alaska's glaciers contributed to one third of the world's ice sheet losses from 2005 to 2010, but a new study suggests melting,
not calving as shown here, contributed to the most loss.
Trace / Erase Wax and aluminum growler casts Created from ice sourced from the waters of Prince William Sound, Alaska, theses sculptures were cast from melting «growlers» - ice
recently calved from tidewater glaciers.
«With spring -
calving herds, the bulls are out during the spring and summer vector season.
Hence the above velocity map of the glacier will indicate higher average velocities in the quadrants with the
highest calving volume flux.
An expanding ice - free season also means bears» stay on land would overlap the entire
caribou calving season and a good portion of a booming geese population's molt and egg - laying season.