pmip3:wg:qi:bc:lidisc
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pmip3:wg:qi:bc:lidisc [2014/12/17 10:38] jypeter created |
pmip3:wg:qi:bc:lidisc [2014/12/26 20:17] ottobli [CMIP6] |
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| ~~DISCUSSION~~ | ~~DISCUSSION~~ | ||
| - | ====== Last Interglacial BC discussion ====== | + | ====== Last Interglacial CMIP6/PMIP6 proposed experiments ====== |
| ===== Goal ===== | ===== Goal ===== | ||
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| The proposed CMIP6 simulation for the LIG is particularly relevant to the WCRP Grand Challenges: Changes in Cryosphere and Regional Sea-level Rise, but also to Regional Climate Information and Clouds, Circulation and Climate Sensitivity because of the large forcings and thus large regional responses as recorded in the data. It addresses well the broad scientific questions: 1. How does the Earth System respond to forcing? and 2. What are the origins and consequences of systematic model biases (especially at high latitudes and relevant to the stability of the ice sheets)? As part of PMIP, some groups will additionally perform transient coupled ice sheet-climate simulations that will provide rates of change for sea level, including regional sea level if offline GIA models applied, as well as a measure of the capability of these models to initiate the next glacial inception. | The proposed CMIP6 simulation for the LIG is particularly relevant to the WCRP Grand Challenges: Changes in Cryosphere and Regional Sea-level Rise, but also to Regional Climate Information and Clouds, Circulation and Climate Sensitivity because of the large forcings and thus large regional responses as recorded in the data. It addresses well the broad scientific questions: 1. How does the Earth System respond to forcing? and 2. What are the origins and consequences of systematic model biases (especially at high latitudes and relevant to the stability of the ice sheets)? As part of PMIP, some groups will additionally perform transient coupled ice sheet-climate simulations that will provide rates of change for sea level, including regional sea level if offline GIA models applied, as well as a measure of the capability of these models to initiate the next glacial inception. | ||
| - | **LIG**: The CMIP6 experiments will evaluate systematic biases and their origins among models on their ability to simulate Arctic warmth and sensitivity of Greenland ice sheet to this warmth, and ocean warming and transmission of subsurface warming from North Atlantic to Southern Ocean, with implications for basal melting of West Antarctic Ice Sheet. | + | The CMIP6 experiments will evaluate systematic biases and their origins among models on their ability to simulate Arctic warmth and sensitivity of Greenland ice sheet to this warmth, and ocean warming and transmission of subsurface warming from North Atlantic to Southern Ocean, with implications for basal melting of West Antarctic Ice Sheet. |
| ===== Design of LIG Experiments ===== | ===== Design of LIG Experiments ===== | ||
| - | ==== Purpose ==== | + | ==== Purposes ==== |
| * Evaluating climate models for warm period, high sea-level stand. | * Evaluating climate models for warm period, high sea-level stand. | ||
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| ==== CMIP6 ==== | ==== CMIP6 ==== | ||
| - | 128ka time slice - large orbital forcing (Figure 1), large responses. | + | 128ka time slice - large orbital forcing, large responses. |
| - | * Orbital parameters set to 128ka. | + | * Orbital parameters set to 128ka (Figure 1). |
| - | * Greenhouse gas concentrations well-known from ice cores [CO2 275ppm; CH4 709ppb; N2O 266 ppb]. | + | * Greenhouse gas concentrations well-known from ice cores (Figure 2), [CO2 275ppm; CH4 709ppb; N2O 266 ppb]. |
| - | * Experiment 1 (Tier 1((The experiments should be well established for Tier 1 and at least tested for Tier 2 and beyond. A sufficient number of modelling centers (~8) are a part of the MIP and committed to simulating all of the MIP‘s Tier 1 experiments for a particular science question.))): AOGCM; modern geography, ice sheets, and vegetation; length: ≥ 100 years after spinup. Initialize from CMIP6 preindustrial DECK simulation. Save appropriate output to allow forcing of offline ice-sheet models. | + | * Experiment 1 (Tier 1): AOGCM; modern geography, ice sheets, and vegetation; length: ≥ 100 years after spinup. Initialize from CMIP6 preindustrial DECK simulation. Save appropriate output to allow forcing of offline ice-sheet models. |
| - | * Experiment 2 (Tier 2((See [[#fnt_1|footnote 1]]))): Coupled AOGCM-ISM; predictive Greenland ice sheet models, asynchronous coupling with 10 ISM years per 1 AOGCM years; length: AOGCM 300 years, ISM 3000 years. Initialize from Experiment 1. | + | * Experiment 2 (Tier 2; collaborative with ISMIP6): Coupled AOGCM-ISM; predictive Greenland ice sheet models, asynchronous coupling with 10 ISM years per 1 AOGCM years; length: AOGCM 300 years, ISM 3000 years. Initialize from Experiment 1. |
| - | ==== PMIP ==== | + | {{:pmip3:wg:qi:bc:li_bc_dic_fig.png?direct&600|Click to get a larger version}} |
| + | |||
| + | ==== PMIP6 ==== | ||
| * 125ka, 122ka time slices. | * 125ka, 122ka time slices. | ||
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| * Relevant topics: climate, ice sheets and sea level, sea ice, monsoons, carbon cycle. | * Relevant topics: climate, ice sheets and sea level, sea ice, monsoons, carbon cycle. | ||
| - | * LIG CMIP6 experiments complement ISMIP6. | + | * LIG CMIP6 experiments, collaborative between PMIP6 and ISMIP6. |
| + | * The experiments should be well established for Tier 1 and at least tested for Tier 2 and beyond. | ||
| + | * A sufficient number of modelling centers (~8) are a part of the MIP and committed to simulating all of the MIP‘s Tier 1 experiments for a particular science question. | ||
pmip3/wg/qi/bc/lidisc.txt · Last modified: 2016/06/20 15:35 by jypeter
