Climate change, mitigation and adaptation: the case of the Murray–Darling Basin in Australia



For the more moderate climate changes projected for 2050, the complementarity
between adaptation and mitigation reflects more specific features of the
projections. In the ‘adaptation only’ simulation, the increased frequency of
drought reduces the set of adaptation options, and precludes most high-value
horticultural activities and opportunity cropping based on irrigation in Wet
states only. By contrast, in the simulations where both adaptation and
mitigation take place, reduced water availability in all states of nature leaves
open a wide range of adaptation opportunities.

Table 4: Estimated effects of climate change on economic value ($m) before and
after adaptation

Simulation       Year

Before
adaptation

After
adaptation

Benefit of
adaptation

Adaptation only

2050

1766

2004

238

2100

962

1042

80

Mitigation and
adaptation

(Environment
residual)_______________

2050

2263

2678

416

2100

2222

2664

442

Mitigation and
adaptation

(Environment priority)

2050

2049

2444

395

2100

2003

2414

410

24



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