Anthony Watts has no climatology qualifications, and his blog is devoid of
any meaningful science. He has continually been debunked by actual
scientists and is only a source of misinformation. Two degrees is a
massive change for average temperatures. It's important to remember that
the average global temp during the last ice age was *only* five degrees
lower than now, and most of Europe, North America, and Tasmania were
covered in ice. Averages are not the same as single day temperatures.
Jeremy O'Wheel
On 31/01/2012 9:01 PM, "Laurie Knight" <> wrote:
Why do you say that a 1.5 to 2C change over 100 years is tiny, Martin? I
would have thought a temperature change of that magnitude is quite
significant.
Anyhow, the article in question is available at http://www.nature.com/**
nclimate/journal/vaop/**ncurrent/full/nclimate1353.**html<http://www.nature.com/nclimate/journal/vaop/ncurrent/full/nclimate1353.html>
The abstract is as follows:
"Enhanced warming over the global subtropical western boundary currents
• Lixin Wu, • Wenju Cai, • Liping Zhang, • Hisashi
Nakamura, • Axel Timmermann, • Terry Joyce,• Michael J. McPhaden,
• Michael Alexander, • Bo Qiu, • Martin Visbeck, • Ping
Chang • & Benjamin Giese
Nature Climate Change (2012) doi:10.1038/**nclimate1353Received 06 May 2011
Accepted 30 November 2011 Published online 29 January 2012
Subtropical western boundary currents are warm, fast-flowing currents that
form on the western side of ocean basins. They carry warm tropical water to
the mid-latitudes and vent large amounts of heat and moisture to the
atmosphere along their paths, affecting atmospheric jet streams and
mid-latitude storms, as well as ocean carbon uptake1, 2, 3, 4. The
possibility that these highly energetic currents might change under
greenhouse-gas forcing has raised significant concerns5, 6, 7, but
detecting such changes is challenging owing to limited observations. Here,
using reconstructed sea surface temperature datasets and century-long ocean
and atmosphere reanalysis products, we find that the post-1900 surface
ocean warming rate over the path of these currents is two to three times
faster than the global mean surface ocean warming rate. The accelerated
warming is associated with a synchronous poleward shift and/or
intensification of global subtropical western boundary currents in
conjunction with a systematic change in winds over both hemispheres. This
enhanced warming may reduce the ability of the oceans to absorb
anthropogenic carbon dioxide over these regions. However, uncertainties in
detection and attribution of these warming trends remain, pointing to a
need for a long-term monitoring network of the global western boundary
currents and their extensions."
The point remains that a lot of pelagic birding occurs along the East
Australian Current and a 2C warming may have a significant impact on marine
activity off SE Australia.
Regards, Laurie.
On 31/01/2012, at 8:52 PM, Martin Wigginton wrote:
> Yes, I agree with Laurie that we should welcome any study that seeks to
> obtain REAL data. With such tiny differences in ocean temperatures, it
> might be difficult to detect impacts on bird distributions. Nevertheless,
> real data is the stuff that counts.
>
> But flawed studies such as Wenju Cai's ocean 'hot-spots' give the game
> away when they state:
>
> “Detecting these changes has been hindered by limited observations but
> with a combination of multi-national ocean watch systems and computer
> simulations we have been able to reconstruct an ocean history…”
>
> We should view with considerable scepticism studies such as these which
> rely so heavily on computer modelling to reach what is clearly a
> pre-determined conclusion.
>
> See also http://wattsupwiththat.com/**2012/01/30/oh-noes-wind-**
> driven-global-warming-hot-**spots/<http://wattsupwiththat.com/2012/01/30/oh-noes-wind-driven-global-warming-hot-spots/>
>
> ------------
> Martin
> *All outgoing mails scanned by Norton Anti-Virus 2011
>
>
> -----Original Message----- From: Laurie Knight
> Sent: Tuesday, January 31, 2012 7:58 AM
> To: Birding Aus
> Subject: [Birding-Aus] Impact of climate change on pelagic birding
>
>
> >
> > There are some interesting articles reporting rapidly rising
> > temperatures in key ocean curren...
>
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