Editing Holocene (section)

=== North America ===
During the Middle Holocene, western North America was drier than present, with wetter winters and drier summers.<ref>{{Cite journal |last1=Steinman |first1=Byron A. |last2=Pompeani |first2=David P. |last3=Abbott |first3=Mark B. |last4=Ortiz |first4=Joseph D. |last5=Stansell |first5=Nathan D. |last6=Finkenbinder |first6=Matthew S. |last7=Mihindukulasooriya |first7=Lorita N. |last8=Hillman |first8=Aubrey L. |date=15 June 2016 |title=Oxygen isotope records of Holocene climate variability in the Pacific Northwest |journal=[[Quaternary Science Reviews]] |volume=142 |pages=40–60 |doi=10.1016/j.quascirev.2016.04.012 |bibcode=2016QSRv..142...40S |issn=0277-3791 |doi-access=free }}</ref> After the end of the thermal maximum of the HCO around 4,500 BP, the [[East Greenland Current]] underwent strengthening.<ref>{{Cite journal |last1=Perner |first1=Kerstin |last2=Moros |first2=Matthias |last3=Lloyd |first3=Jeremy M. |last4=Jansen |first4=Eystein |last5=Stein |first5=Rüdiger |date=1 December 2015 |title=Mid to late Holocene strengthening of the East Greenland Current linked to warm subsurface Atlantic water |url=https://www.sciencedirect.com/science/article/pii/S0277379115301311 |journal=[[Quaternary Science Reviews]] |volume=129 |pages=296–307 |doi=10.1016/j.quascirev.2015.10.007 |bibcode=2015QSRv..129..296P |s2cid=129732336 |issn=0277-3791 |access-date=11 September 2023}}</ref> A massive megadrought occurred from 2,800 to 1,850 BP in the [[Great Basin]].<ref>{{Cite journal |last1=Mensing |first1=Scott A. |last2=Sharpe |first2=Saxon E. |last3=Tunno |first3=Irene |last4=Sada |first4=Don W. |last5=Thomas |first5=Jim M. |last6=Starratt |first6=Scott |last7=Smith |first7=Jeremy |date=15 October 2013 |title=The Late Holocene Dry Period: multiproxy evidence for an extended drought between 2800 and 1850 cal yr BP across the central Great Basin, USA |url=https://www.sciencedirect.com/science/article/pii/S0277379113003156 |journal=[[Quaternary Science Reviews]] |volume=78 |pages=266–282 |doi=10.1016/j.quascirev.2013.08.010 |bibcode=2013QSRv...78..266M |issn=0277-3791 |access-date=10 September 2023}}</ref>

Eastern North America underwent abrupt warming and humidification around 10,500 BP and then declined from 9,300 to 9,100 BP. The region has undergone a long term wettening since 5,500 BP occasionally interrupted by intervals of high aridity. A major cool event lasting from 5,500 to 4,700 BP was coeval with a major humidification before being terminated by a major drought and warming at the end of that interval.<ref>{{Cite journal |last1=Shuman |first1=Bryan N. |last2=Marsicek |first2=Jeremiah |date=1 June 2016 |title=The structure of Holocene climate change in mid-latitude North America |journal=[[Quaternary Science Reviews]] |volume=141 |pages=38–51 |doi=10.1016/j.quascirev.2016.03.009 |bibcode=2016QSRv..141...38S |issn=0277-3791 |doi-access=free }}</ref>