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Comment Chapter Team Response Id Page Line Page Line 254 3 0 0 Establish Approximate Correspondence in the Sections of Chapter 2 and Visa Versa SROCC First Order Draft Expert Review Comments - Chapter 3 Comment Chapter From From To To Comment Chapter Team Response id page line page line 254 3 0 0 Establish approximate correspondence in the sections of Chapter 2 and visa versa. For Taken into acccount. Polar Regions have their own prioritisation of example, a section similar to Section 2.4.2 is missing. [Bilal Ayyub, USA] issues that we reflect in our structure. We cross-reference to other chapters in the text at the level of topics 2262 3 0 0 Chapter 3 – include recent Antarctic observations from IMBIE team (“Mass balance of the Accepted - IMBIE figure added to Section 3.3.1 Antarctic Ice Sheet from 1992 to 2017”, Nature, doi:10.1038/s41586-018-0179-y.pdf). [Kristin Campbell, USA] 3640 3 46 33 (Braithwaite et al., 2015a; Braithwaite et al., 2015b; Seyboth et al.,2016)(high confidence). - Taken into account. An error occurred when chapter 3 references please insert hyphen between brackets [Angelika Brandt, Germany] were compiled in Endnote by the TSU resulting in a displacement of some references. These displaced references have been fixed in the revised draft. 2388 3 0 0 Chapter 3 – include recent Antarctic observations from IMBIE team (“Mass balance of the Accepted - IMBIE figure added to Section 3.3.1 Antarctic Ice Sheet from 1992 to 2017”, Nature, doi:10.1038/s41586-018-0179-y.pdf). [Durwood Zaelke, USA] 15560 3 3 0 5 Exec Summary does a good job of capturing what is happening in polar regions. Is more Taken into account. This is too detailed information for the data available because of focused scientific cooperation arrangements (e.g. Arctic Council, Executive Summary, but the issue is discussed in section 3.5 Antarctic Treaty? How do these arrangements improve governance? [Melinda Kimble, USA] 18476 3 3 0 I suggest shortening the footnote to the last brackets i.e. "See Section 1.8.3 and Table 1.2 Rejected. Footnote was added by IPCC TSU for more details." [Anette Jönsson, Sweden] 7068 3 0 0 Missing information about a response to climate change in Antarctica under the Taken into account. This aspect was considered, but is perceived to antropogenic influence: there are obviously no "citizens" but the density of the Antartic be minimal on a global scale, which is what SROCC seeks to research stations is teadily increasing. Are there any estimates of the ecological impact of address. these stations, e.g. in the Antarctic Peninsula region? [APECS Group Review, Germany] 19176 3 3 0 5 Many of the key messages have a heavy and technical language. Consider to work on Accepted; we have refined the Key Messages to improve readability. simplyfying, in order to communicate to readers the main results [Marianne Kroglund, Norway] 10982 3 0 0 Overall the report summary failed to capture the rapidity, complexity and seriousnes of Taken into account. we added regional summaries of changes in climate change forcing in the Arctic. The physical changes and perceived human impacts SST and BT in the Arctic from the ensemble means of CMIP5 are provided, but there is a little appreciation of how physical oceanography determines the (3.2.3.1. These demonstrate when major changes will be occurring species structure and microbial interactions in the Arctic. Basically this is the connection in the Arctic. We also discuss how changes in climate will impact between human coastal inhabitants and the sea in different arctic regions. These benthic pelagic coupling (3.2.3.1). We disagree that the chapter connections are not well expressed while the report is extensive there is a failure to does not depict how climate change impacts ecosystem structure. objectively use the information and state the obvious. [Connie Lovejoy, Canada] The microbial interactions were not included due to space limitations. 19182 3 3 0 5 General comment: the key messages are more technical than they need to be, and include See response to 19176 terminology that may be unfamilier to many readers. [Marianne Kroglund, Norway] 12058 3 0 0 There is no statement that in paleoclimate sea level has risen in the order of meters per Rejected- ice sheet projections and sea level impacts are now century on occasion. Why is this absent? Given models are imperfect statements of fact covered in Chapter 4. We also assess this palaeoclimate evidence about processes we do not fully understand give boundaries. This is especially important in Cross Chapter Box 2. because we are warming the planet (ocean) dozens of times faster than it has previously warmed in Earth's history. [Michael Casey, Germany] Do not Cite, Quote or Distribute Page 1 of 226 SROCC First Order Draft Expert Review Comments - Chapter 3 Comment Chapter From From To To Comment Chapter Team Response id page line page line 12886 3 0 0 Chapter 3 – include recent Antarctic observations from IMBIE team (“Mass balance of the Accepted - IMBIE figure added to Section 3.3.1 Antarctic Ice Sheet from 1992 to 2017”, Nature, doi:10.1038/s41586-018-0179-y.pdf). [Gabrielle Dreyfus, USA] 19184 3 3 0 5 Key message on extremes/abrupt change/thresholds missing -- are there sections in the Taken into account; aspects of such changes are drawn out more chapter that can substantiate such (a) key message(s)? [Marianne Kroglund, Norway] clearly, though the natural home for many such things in SROCC is Chapter 6, which is dedicated to this subject. 13002 3 0 0 Chapter 3: include recent observations on bedrock uplift from Barletta, V. R., et al. (2018) Accepted - this issue is assessed in Cross Chapter Box 2 Observed rapid bedrock uplift in Amundsen Sea Embayment promotes ice-sheet stability, SCIENCE 360:1335-1339. [Gabrielle Dreyfus, USA] 19186 3 3 0 5 Possible to add key message on future projections for key climate change parameters more Taken into account. Whre possible we have included impacts on explicitly? [Marianne Kroglund, Norway] important processes for global climate change by individual future scenario 17344 3 3 1 5 55 This Chapter's ES is a bit less clear and readable compared to the other chapters, perhaps Accepted; we have refined the Exec Summary to aid readability. due to multiple authors; so could benefit from some editorial work for the Second-Order Citation to chapter 4 is now included in the relevant Key Message. Draft. This is an especially dense Chapter and clearly the longest of the FOD, so the ES beccomes even more important for communicating main messages. Would also suggest a reference to Chapter 4 in terms of greater expansion there of impacts from glacier and ice sheet melt from Polar regions. [Pamela Pearson, USA] 14374 3 0 0 References list: there are many references that are incomplete or with formatting problems. accepted: reference section compiled anew in consistent style [Sérgio Henrique Faria, Spain] 17894 3 0 0 It would be helpful if there was some further coordination and cross referencing of Accepted - New Cross Chapter Box 2 addresses this issue. information between Ch3 and Ch4, particularly in relation to the important topic of Antarctic contribution to sea level, and modeling of the Antarctic ice sheet. [Haroon Kheshgi, USA] 24384 3 3 1 Please ensure balance among the three sections of the ES, the first section is dominating Taken into account. The ES has been restructured. [Hans-Otto Poertner and WGII TSU, Germany] 16932 3 3 5 3 5 "interdisciplinary elements of the Arctic and Antarctic systems … their… impacts" sounds Accepted. KM is revised strange. The elements (be they physical or societal) are not disciplinary or interdisciplinary, whereas their study well may be one or the other. Reword? [Markku Rummukainen, Sweden] 19072 3 0 0 Missing information on limits to adaptation and loss and damage in polar regions [Carl- taken into account. While the former concept is adressed in cross Friedrich Schleussner, Germany] cutting chapter 6, the latter concept/policy is predominatly applied in developing countries that are particularly vulnerable to the adverse effects of climate change, and is not to our knowledge applied in polar regions. 24970 3 3 5 3 5 What does "different interdisciplinary elements" mean? The introduction rests on an Accepted. KM is revised understanding of those terms. [Elizabeth Speer, USA] 24978 3 3 5 3 6 "interdisciplinary elements of the Arctic and Antarctic systems” sounds technical and may Accepted. KM is revised not be understood by the key audience of the Executive Summaries. [Hans-Otto Poertner and WGII TSU, Germany] 19834 3 0 0 Please add "firn (cores)" to the glossary and refer to it at first use [Michelle A. North, Rejected: terms must appear in more than 1 chapter to be included South Africa] in the glossary. Do not Cite, Quote or Distribute Page 2 of 226 SROCC First Order Draft Expert Review Comments - Chapter 3 Comment Chapter From From To To Comment Chapter Team Response id page line page line 1640 3 3 10 3 12 In the beginning of the Executive Summary: Please consider to include an additional Accepted; we have strengthened the opening parts of the Exec paragraph on temperature change in polar regions, e.g. as described in the SWIPA report or Summary by including Key Messages that speak to polar section 3.1 on page 7 in this chapter. [Aurora Stenmark, Norway] temperature change directly. 12052 3 3 10 3 10 Many regions in Polar regions have warmed several degrees higher than the global warming Accepted; we have revised the Exec Summary to highlight this average and are expected to continue to do so. [Michael Casey, Germany] important fact more clearly. 19950 3 0 0 I find the oscillating between Arctic and Antarctic paragraphs extremely confusing, because Accepted: The number of subheadings that can be used is limited, it will take at least a couple of sentences to realize that we've now moved across to the but we have added explicit mention of Arctic and Antarctic at the other side of the world from the previous train of thought.
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