James Renwick takes a guess on a blob to the east of New Zealand
Note: This is from foreign media.
Scientists are "puzzled" once again and the scientist at Victoria University who I think will give any explanation to justify his "easy-does-it" approach to climate change thinks it is due to "more sun"and "less wind".
“It’s just a patch of water that’s had a lot of sunny skies and not much wind”.
These people take a description and call it a "cause"
Our part of the world is still one of the windiest on the planet. ***
have been reporting on a hot blob in the Tasman Sea for the last 3
years. During that period it never went away and only dissipated over
the last year.
was observing and reporting on this LONG BEFORE the authorities who
only mentioned it when it was too obvious to be ignored while always
reporting in a way that understated the phenomenon (I am talking of
NZ's NIWA, the equivalent of NOAA.
Lots of sun?
blob: vast patch of warm
water off New Zealand coast
of water in the Pacific Ocean off NZ is 6C hotter than normal,
possibly due to a lack of wind in the region
spike in water temperature of up to 6C above average across a massive
patch of ocean east of New Zealand is likely to have been caused by
an “anti-cyclone” weather system, a leading scientist says.
on heat maps as a deep red blob, the patch spans at least a million
square kilometres – an area nearly 1.5 times the size of Texas, or
four times larger than New Zealand – in the Pacific Ocean.
Renwick, the head of geography, environment and earth sciences at
Victoria University in Wellington, said the scale of the temperature
spike near the sparsely populated Chatham Islands archipelago was
remarkable, and had been building for weeks.
the biggest patch of above average warming on the planet right now.
Normally the temperatures there are about 15C, at the moment they are
about 20C,” he said.
said the blob could be linked to rising atmospheric greenhouse gas
emissions, as a result of climate change, but he expected it was
overwhelmingly due to natural variability – a strong high pressure
system and a lack of wind.
not uncommon to see patches of warmer water off New Zealand but this
magnitude of four, five, up to six degrees is pretty unusual,”
probably a very thin layer of ocean that has warmed up and there
hasn’t been any wind to cool it for several weeks.”
form when a mass of air cools, contracts and becomes more dense,
increasing the weight of the atmosphere and the surface air pressure.
said a surge in ocean heat over a short period could be difficult for
local marine life if it penetrated far beyond the surface. Ocean
temperatures are less prone to sharp changes than those on land due
to the amount of energy required to warm an area of water.
said scientists would study the spike in coming weeks to gain more
insight into its cause and local impact. It followed a marine
heatwave two summers ago that propelled New Zealand’s hottest
summer on record, more than 3C above average, and led to tropical
fish from Australia being found along the country’s coast.
(Ed.This was NOT a one-off blob that came and went as described here but was here for at least 2 years and has only dissipated in the last few months)
the globe, the World Meteorological Organisation says the last decade
has almost certainly been the hottest on record for land and oceans.
Seas have also grown more acidic as they have absorbed carbon dioxide
from the atmosphere.