Post by Ian Thomas on Jul 10, 2023 6:25:33 GMT 10
Here's a paper that's interesting for three reasons. At least, imho.
1/
It shows (yet again) that Earth's climate can transit suddenly from one state to another, on a timescale of around a decade.
2/
The results tell us climate 'flips' occur without any help from human industrial inputs.
3/
The Little Ice Age was global in extent.
Climate activists underplay the importance of the LIA, even going so far as to write it out of the data.
1/
It shows (yet again) that Earth's climate can transit suddenly from one state to another, on a timescale of around a decade.
2/
The results tell us climate 'flips' occur without any help from human industrial inputs.
3/
The Little Ice Age was global in extent.
Climate activists underplay the importance of the LIA, even going so far as to write it out of the data.
Abrupt change in tropical Pacific climate mean state during the Little Ice Age
Communications Earth & Environment.
www.nature.com/articles/s43247-023-00882-7
Here we present a new high-resolution paleohydrological record using the stable-hydrogen-isotopic composition of terrestrial-lipid biomarkers from a 1,400-year-old lake sedimentary sequence from northern Philippines.
Results show a dramatic and abrupt increase in "δDwax" (a proxy) values around 1630 AD with sustained high values until around 1900 AD. We interpret this change as a shift to significantly drier conditions in the western tropical Pacific during the second half of the Little Ice Age as a result of a change in tropical Pacific mean state tied to zonal sea surface temperature (SST) gradients.
Communications Earth & Environment.
www.nature.com/articles/s43247-023-00882-7
Here we present a new high-resolution paleohydrological record using the stable-hydrogen-isotopic composition of terrestrial-lipid biomarkers from a 1,400-year-old lake sedimentary sequence from northern Philippines.
Results show a dramatic and abrupt increase in "δDwax" (a proxy) values around 1630 AD with sustained high values until around 1900 AD. We interpret this change as a shift to significantly drier conditions in the western tropical Pacific during the second half of the Little Ice Age as a result of a change in tropical Pacific mean state tied to zonal sea surface temperature (SST) gradients.
Our findings highlight the prominent role of abrupt shifts in zonal sea surface temperature gradients on multidecadal to multicentennial timescales in shaping the tropical Pacific hydrology of the last millennium, and demonstrate that a marked transition in the tropical Pacific mean state can occur within a period of a few decades.
