Several recent studies have reported adaptation costs for climate change, including for developing countries. They have similar-sized estimates and have been influential in discussions on this issue.
However, the studies have a number of deficiencies which need to be transparent and addressed more systematically in the future. A re-assessment of the UNFCCC estimates for 2030 suggests
that they are likely to be substantial under-estimates. The purpose of this report is to illustrate the uncertainties in these estimates rather than to develop new cost estimates, which is a much larger task than can be accomplished here. The main reasons for under-estimation are that: (i) some sectors have not been included in an assessment of cost (e.g. ecosystems, energy, manufacturing, retailing, and tourism); (ii) some of those sectors which have been included have been only partially covered; and (iii) the additional costs of adaptation have sometimes been calculated as
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/assessing-costs-adaptation-climate-change-review-unfccc-and-other-recent-estimat-1
[2] http://admin.indiaenvironmentportal.org.in/category/author/martin-parry
[3] http://admin.indiaenvironmentportal.org.in/category/author/nigel-arnell
[4] http://admin.indiaenvironmentportal.org.in/category/author/pam-berry-et-al
[5] http://admin.indiaenvironmentportal.org.in/category/publisher/iied
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/unfccc
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-adaptation
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/adaptation-fund
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/china
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/developing-countries