New research, January 15-21, 2018

A selection of new climate related research articles is shown below.

The figure is from paper #63.

Climate change mitigation

1. Does replacing coal with wood lower CO2 emissions? Dynamic lifecycle analysis of wood bioenergy

"Because combustion and processing efficiencies for wood are less than coal, the immediate impact of substituting wood for coal is an increase in atmospheric CO2 relative to coal. The payback time for this carbon debt ranges from 44–104 years after clearcut, depending on forest type—assuming the land remains forest. Surprisingly, replanting hardwood forests with fast-growing pine plantations raises the CO2 impact of wood because the equilibrium carbon density of plantations is lower than natural forests. Further, projected growth in wood harvest for bioenergy would increase atmospheric CO2 for at least a century because new carbon debt continuously exceeds NPP. Assuming biofuels are carbon neutral may worsen irreversible impacts of climate change before benefits accrue."

2. Impacts of nationally determined contributions on 2030 global greenhouse gas emissions: uncertainty analysis and distribution of emissions

"We estimate that NDCs project into 56.8–66.5 Gt CO2eq yr−1emissions in 2030 (90% confidence interval), which is higher than previous estimates, and with a larger uncertainty range. Despite these uncertainties, NDCs robustly shift GHG emissions towards emerging and developing countries and reduce international inequalities in per capita GHG emissions. Finally, we stress that current NDCs imply larger emissions reduction rates after 2030 than during the 2010–2030 period if long-term temperature goals are to be fulfilled. Our results highlight four requirements for the forthcoming 'climate regime': a clearer framework regarding future NDCs' design, an increasing participation of emerging and developing countries in the global mitigation effort, an ambitious update mechanism in order to avoid hardly feasible decarbonization rates after 2030 and an anticipation of steep decreases in global emissions after 2030."

3. From appropriate technology to the clean energy economy: renewable energy and environmental politics since the 1970s

4. The reduction in low-frequency noise of horizontal-axis wind turbines by adjusting blade cone angle

5. Federal research, development, and demonstration priorities for carbon dioxide removal in the United States

6. Study on performance enhancement and emission reduction of used fuel-injected motorcycles using bi-fuel gasoline-LPG

7. Response to marine cloud brightening in a multi-model ensemble

8. Social cost of carbon pricing of power sector CO2: accounting for leakage and other social implications from subnational policies

"Results indicate that CO2 leakage is possible within and outside the electric sector, ranging from negative 70% to over 80% in our scenarios, with primarily positive leakage outcomes. Typically ignored in policy analysis, leakage would affect CO2 reduction benefits. We also observe other potential societal effects within and across regions, such as higher electricity prices, changes in power sector investments, and overall consumption losses. Efforts to reduce leakage, such as constraining power imports into the SCC pricing region likely reduce leakage, but could also result in lower net emissions reductions, as well as larger price increases."

9. Economic consequences of global climate change and mitigation on future hydropower generation

10. Impacts of Foreign Direct Investment and Economic Development on Carbon Dioxide Emissions Across Different Population Regimes

11. Promoting firms’ energy-saving behavior: The role of institutional pressures, top management support and financial slack

12. Studying household decision-making context and cooking fuel transition in rural India

13. Assessment of renewable energy expansion potential and its implications on reforming Japan's electricity system

Climate change

14. Climatic and associated cryospheric, biospheric, and hydrological changes on the Tibetan Plateau: a review

15. Climate change projections over China using regional climate models forced by two CMIP5 global models. Part II: projections of future climate

16. Future Caribbean Climates in a World of Rising Temperatures: The 1.5 vs 2.0 Dilemma

Climate Forcings and Feedbacks

17. An assessment of tropospheric water vapor feedback using radiative kernels

"Water vapor feedbacks on different time scales are investigated using radiative kernels applied to the Atmospheric Infrared Sounder (AIRS) and Microwave Limb Sounder (MLS) satellite observations, as well as the Coupled Model Intercomparison Project Phase 5 (CMIP5) model simulation results. We show that the magnitude of short-term global water vapor feedback based on observed interannual variations from 2004 to 2016 is 1.55 ± 0.23 W m–2 K–1, while model simulated results derived from the CMIP5 runs driven by observed sea surface temperature range from 0.99 to 1.75 W m–2 K–1, with a multi-model-mean of 1.40 W m–2 K–1. The long-term water vapor feedbacks derived from the quadrupling of CO2 runs range from 1.47 to 2.03 W m–2 K–1, higher than the short-term counterparts. The systematic difference between short-term and long-term water vapor feedbacks illustrates that care should be taken when inferring long-term feedbacks from interannual variabilities. Also, the magnitudes of the short-term and long-term feedbacks are closely correlated (R = 0.60) across the models, implying that the observed short-term water vapor feedback could be used to constrain the simulated long-term water vapor feedback. Based on satellite observations, the inferred long-term water vapor feedback is about 1.85 ± 0.32 W m–2 K–1."

18. Probabilities of causation of climate changes

19. An intraseasonal variability in CO2 over the Arctic induced by the Madden−Julian oscillation

20. Climate Feedback on Aerosol Emission and Atmospheric Concentrations

Temperature and Precipitation

21. Big Jump of Record Warm Global Mean Surface Temperature in 2014-2016 Related to Unusually Large Oceanic Heat Releases

"A 0.24°C jump of record warm global mean surface temperature (GMST) over the past three consecutive record-breaking years (2014-2016) was highly unusual and largely a consequence of an El Niño that released unusually large amounts of ocean heat from the subsurface layer of the northwestern tropical Pacific (NWP). This heat had built up since the 1990s mainly due to greenhouse-gas (GHG) forcing and possible remote oceanic effects. Model simulations and projections suggest that the fundamental cause, and robust predictor of large record-breaking events of GMST in the 21st century is GHG forcing rather than internal climate variability alone. Such events will increase in frequency, magnitude and duration, as well as impact, in the future unless GHG forcing is reduced."

22. Large-scale pattern of the diurnal temperature range changes over East Asia and Australia in boreal winter: A perspective of atmospheric circulation

23. Temperature–topographic elevation relationship for high mountain terrain: an example from the southeastern Tibetan Plateau

24. Seasonal and elevational contrasts in temperature trends in Central Chile between 1979 and 2015

25. Future changes over the Himalayas: Maximum and minimum temperature

26. Time of emergence in regional precipitation changes: an updated assessment using the CMIP5 multi-model ensemble

27. Future changes in extreme precipitation indices over Korea

28. Regional frequency analysis of extreme rainfall in Sicily (Italy)

29. Decadal change of the south Atlantic ocean Angola–Benguela frontal zone since 1980

30. Do changing weather types explain observed climatic trends in the Rhine basin? An analysis of within and between-type changes


31. Causes of glacier melt extremes in the Alps since 1949

"Using surface energy balance simulations, we show that three independent drivers control melt: global radiation, latent heat and the amount of snow at the beginning of the melting season. Extremes are governed by large deviations in global radiation combined with sensible heat. Long-term trends are driven by the lengthening of melt duration due to earlier and longer-lasting melting of ice along with melt intensification caused by trends in long-wave irradiance and latent heat due to higher air moisture."

32. Widespread Moulin Formation During Supraglacial Lake Drainages in Greenland

33. Characterizing permafrost active layer dynamics and sensitivity to landscape spatial heterogeneity in Alaska


34. Quantifying the sources of uncertainty in an ensemble of hydrological climate-impact projections

35. Groundwater recharge in desert playas: current rates and future effects of climate change

36. Sources of uncertainty in hydrological climate impact assessment: a cross-scale study

Carbon Cycle

37. Simulated impact of glacial runoff on CO2 uptake in the Gulf of Alaska

38. The Accelerating Land Carbon Sink of the 2000s may not be Driven Predominantly by the Warming Hiatus

"A conceptual model of the annual/seasonal temperature response of respiration suggests that changes in seasonal temperature during this period are unlikely to cause a significant decrease in annual respiration. The ecosystem models suggest that trends in both gross primary production and terrestrial ecosystem respiration slowed down slightly, but the resulting slight acceleration in net ecosystem productivity is insufficient to explain the increasing trend in SLAND. Instead, the roles of alternative drivers on the accelerating SLAND seem to be important."

Atmospheric and Oceanic Circulation

39. Contribution of Surface Thermal Forcing to Mixing in the Ocean

40. Towards optimal observational array for dealing with challenges of El Niño-Southern Oscillation predictions due to diversities of El Niño

Extreme Events

41. How does dynamical downscaling affect model biases and future projections of explosive extratropical cyclones along North America’s Atlantic coast?

42. What's the Worst That Could Happen? Re-examining the 24–25 June 1967 Tornado Outbreak Over Western Europe

Climate change impacts


43. Hendra Virus Spillover is a Bimodal System Driven by Climatic Factors

44. Modelling maize phenology, biomass growth and yield under contrasting temperature conditions

45. Mapping water availability, cost and projected consumptive use in the eastern United States with comparisons to the west

"Although few administrative limits have been set on water availability in the east, water managers have identified 315 fresh surface water and 398 fresh groundwater basins (with 151 overlapping basins) as areas of concern (AOCs) where water supply challenges exist due to drought related concerns, environmental flows, groundwater overdraft, or salt water intrusion. This highlights a difference in management where AOCs are identified in the east which simply require additional permitting, while in the west strict administrative limits are established. Although the east is generally considered 'water rich' roughly a quarter of the basins were identified as AOCs; however, this is still in strong contrast to the west where 78% of the surface water basins are operating at or near their administrative limit."


46. A positive relationship between spring temperature and productivity in 20 songbird species in the boreal zone

"Anthropogenic climate warming has already affected the population dynamics of numerous species and is predicted to do so also in the future. To predict the effects of climate change, it is important to know whether productivity is linked to temperature, and whether species’ traits affect responses to climate change. To address these objectives, we analysed monitoring data from the Finnish constant effort site ringing scheme collected in 1987–2013 for 20 common songbird species together with climatic data. Warm spring temperature had a positive linear relationship with productivity across the community of 20 species independent of species’ traits (realized thermal niche or migration behaviour), suggesting that even the warmest spring temperatures remained below the thermal optimum for reproduction, possibly due to our boreal study area being closer to the cold edge of all study species’ distributions. The result also suggests a lack of mismatch between the timing of breeding and peak availability of invertebrate food of the study species. Productivity was positively related to annual growth rates in long-distance migrants, but not in short-distance migrants. Across the 27-year study period, temporal trends in productivity were mostly absent. The population sizes of species with colder thermal niches had decreasing trends, which were not related to temperature responses or temporal trends in productivity. The positive connection between spring temperature and productivity suggests that climate warming has potential to increase the productivity in bird species in the boreal zone, at least in the short term."

47. Hillslope topography mediates spatial patterns of ecosystem sensitivity to climate

48. ‘Stick with your own kind, or hang with the locals?’ Implications of shoaling strategy for tropical reef fish on a range-expansion frontline

49. Biological traits explain bryophyte species distributions and responses to forest fragmentation and climatic variation

50. Shock and stabilisation following long-term drought in tropical forest from 15 years of litterfall dynamics

51. Amazon droughts and forest responses: Largely reduced forest photosynthesis but slightly increased canopy greenness during the extreme drought of 2015/2016

52. Anthropogenic nitrogen deposition ameliorates the decline in tree growth caused by a drier climate

53. Trees on the move: using decision theory to compensate for climate change at the regional scale in forest social-ecological systems

54. A unified framework of plant adaptive strategies to drought: crossing scales and disciplines

55. Towards Developing a Mechanistic Understanding of Coral Reef Resilience to Thermal Stress Across Multiple Scales

56. Thermal and hydrologic responses to climate change predict marked alterations in boreal stream invertebrate assemblages

57. The responses of microbial temperature relationships to seasonal change and winter warming in a temperate grassland soil

58. Precipitation frequency alters peatland ecosystem structure and CO2 exchange: contrasting effects on moss, sedge, and shrub communities

59. Highly dynamic wintering strategies in migratory geese: coping with environmental change

"Our findings demonstrate that individual winter strategies are very flexible and able to change over time, suggesting that phenotypic plasticity and cultural transmission are important drivers of strategy choice in this species. Growing benefits from exploratory behaviours, including the ability to track rapid land use changes, may ultimately result in increased resilience to global change."

Other Impacts

60. The sensitivity of US wildfire occurrence to pre-season soil moisture conditions across ecosystems

61. Circumpolar spatio-temporal patterns and contributing climatic factors of wildfire activity in the Arctic tundra from 2001–2015

Other papers

62. Tropical Atlantic climate and ecosystem regime shifts during the Paleocene–Eocene Thermal Maximum

63. Autumn–winter minimum temperature changes in the southern Sikhote-Alin mountain range of northeastern Asia since 1529 AD

64. Memory matters: A case for Granger causality in climate variability studies

Posted by Ari Jokimäki on Thursday, 25 January, 2018

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