The document discusses Semillon grape production and winemaking in Australia. It provides data showing that in 2008, the largest producers of Semillon grapes were the Riverina and Murray Darling regions, together accounting for over 55,000 tons. It then examines Semillon wine production in different Australian regions, noting stylistic differences and some prominent producers. Specific vintages of Semillon wines from top producers like Tyrrell's and Peter Lehmann are also mentioned to showcase the aging potential of the varietal.

1. Semillon Andrew Thomas 22 nd September, 2010 Landmark Australia Tutorial

3. Semillon production 2008 Region Tonnes Barossa Valley 6842 Clare Valley 843 Hunter Valley 4270 Margaret River 6136 Murray Darling 12960 SA Riverland 11210 Riverina 44038 Rest of Australia 12220 TOTAL AUSTRALIA 98519

4. White Varietal intake (tonnes) by vintage 2010 2008 2006 Chardonnay 315,000 444,000 423,000 Semillon 76,000 99,000 97,000 Sauvignon Blanc 76,000 66,000 42,000

5. Regional climatic comparisons Lower Hunter Barossa Clare Valley Margaret River Latitude 32° 50’ S 34° 29’ S 33° 52’ S 33° 57’ S HDD (Oct – Apr) 2070 1590 1576 1690 Mean Jan Temp 22.7 21.2 21.5 20.4 Annual Rainfall (mm) 740 504 632 1130 Oct –Apr (mm) 530 220 245 274 RH (Oct Apr 3pm) 49% 39% 36% 59%