Extending)southeastern)Australias) instrumental)climate)record:)) - - PowerPoint PPT Presentation

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Extending)southeastern)Australias) instrumental)climate)record:)) - - PowerPoint PPT Presentation

Jul 13, 2023 675 likes •816 views

Extending)southeastern)Australias) instrumental)climate)record:)) data)quality)and)availability)) 17881859 ! Linden!Ashcro-,!David!Karoly!and!Jolle!Gergis! ! 10 th !EUMETNET!Data!Management!Workshop! 28!October!2015!

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SLIDE 1

Extending)southeastern)Australia’s) instrumental)climate)record:)) data)quality)and)availability)) 1788–1859!

Linden!Ashcro-,!David!Karoly!and!Joëlle!Gergis!

! 10th!EUMETNET!Data!Management!Workshop! 28!October!2015!

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SLIDE 2

2!

Why!do!we!need!historical!climate!data?!

Context! CalibraNon! Coverage!

University!of!Wisconsin!

Ballarat,!Victoria,!2000!

Susan!GordonTBrown,!State!Library!of!Victoria!(SLV)!

Northern!South!Australia,!1865!

Robert!Bruce,!SLV!!

1000! 4000!

Northern! Hemisphere! Southern! Hemisphere!

1850! 1900! 1950! 2000! Jones!et!al.!2012!

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SLIDE 3

What!exists!in!Aust.!for!1788–1860?!

Image:!Encyclopedia!Britannica,!1903!(www.ebay.co.uk);!Ashcro-.!!

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SLIDE 4

StaNons!are!confined!to!the!coast!

9!

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SLIDE 5

Data!are!available!from!1788!!

8!

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SLIDE 6

Some!observaNons!have!biases!

Images!used!with!permission!from!SLNSW,!Science!Museum!UK.!!

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SLIDE 7

Others!have!reliability!issues!

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SLIDE 8

But!overall!are!surprisingly!good!

anomalies!relaNve!to!1910–1950!

5!

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SLIDE 9

East!coast,!1826–1860!

Drought!in!NSW! Snow!in!Sydney,!unseasonably!cold! Drought!in!NSW! Cool!and!wet! Warm!and!wet! 4!

Ashcro-!et!al.!2014.!anomalies!relaNve!to!1910–1950!and!reset!to!zero!

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SLIDE 10

South,!1825–1860!

3! Cold,!wet,!snow!! Warm!and!dry! Wet!then!dry!preceding!! Bushfires!(Black!Thursday)!

Ashcro-!et!al.!2014.!anomalies!relaNve!to!1910–1950!and!reset!to!zero!

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SLIDE 11

Prolonged!wet!and!dry!periods,!1835–2012!

2!

Ashcro-!et!al.!2015.!

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SLIDE 12

The!data!are!now!publicly!available!

Ashcro-,!Gergis!and!Karoly.!2014.!A!historical!climate!dataset!for!southeastern!Australia,!1788– 1859.!Geoscience(Data(Journal,!1(2):!158–178,!DOI:!10.1002/gdj3.19.!! Ashcro-,!Gergis!and!Karoly.!2015.!LongTterm!staNonarity!of!El!Niño–Southern!OscillaNon! teleconnecNons!in!southeastern!Australia.!Climate(Dynamics,!DOI:!10.1007/s00382T015T2746T3!!

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SLIDE 13

Any!and!all!quesNons!welcome!! lindenclaire.ashcro-@urv.cat!|!@lindenashcro-!

What!happens!now?! What!do!these!historical!records!have!to!say!about!our!climate?! But!are!they!any!good?! What!data!exist!for!Australia?!! Why!do!we!need!historical!weather!data?!

1.!To!improve!our!understanding!of!past,!present!and!future!climate! 2.!ConNnuous!data!back!to!1828,!patchy!observaNons!back!to!1788! 3.!They!are!good!enough!to!look!at!yearTtoTyear!climate!variability! 4.!Lots!! 5.!Explore!regional!and!hemispheric!teleconnecNon!stability,!extreme!events,! agreement!with!proxy!data,!find!more!data,!etc.,!etc…!

!Conclusions!