Exploring the role of lags and legacies in the productivity of Australian ecosystems

2021 ◽  
Author(s):  
Jon Page ◽  
Martin De Kauwe ◽  
Gab Abramowitz
Keyword(s):  
Climate Change ◽  
Climate Extremes ◽  
Multiple Time Scales ◽  
Plant Responses ◽  
Multiple Time ◽  
Legacy Effects ◽  
Ecological Memory ◽  
Using Data ◽  
The Impact

<p>The vegetation’s response to climate change is a major source of uncertainty in terrestrial biosphere model (TBM) projections. Constraining carbon cycle feedbacks to climate change requires improving our understanding of both the direct plant physiological responses to global change, as well as the role of legacy effects (e.g. reductions in plant growth, damage to the plant’s hydraulic transport system), that drive multi-timescale feedbacks. In particular, the role of these legacy effects - both the timescale and strength of the memory effect - have been largely overlooked in the development of model hypotheses. This is despite the knowledge that plant responses to climatic drivers occur across multiple time scales (seconds to decades), with the impact of climate extremes (e.g. drought) resonating for many years. Using data from 13 eddy covariance sites, covering two rainfall gradients in Australia, in combination with a hierarchical Bayesian model, we characterised the timescales of influence of antecedent drivers on fluxes of net carbon exchange and evapotranspiration. Using our data assimilation approach we were able to partition the influence of ecological memory into both biological and environmental components. Overall, we found that the importance of ecological memory to antecedent conditions increased as water availability declines. Our results therefore underline the importance of capturing legacy effects in TBMs used to project responses in water limited ecosystems.</p>

scholarly journals Are We Doing ‘Systems’ Research? An Assessment of Methods for Climate Change Adaptation to Hydrohazards in a Complex World

2019 ◽  
Vol 11 (4) ◽  
pp. 1163 ◽  
Author(s):  
Melissa Bedinger ◽  
Lindsay Beevers ◽  
Lila Collet ◽  
Annie Visser
Keyword(s):  
Climate Change ◽  
Human Nature ◽  
Climate Change Adaptation ◽  
Time Scales ◽  
Spatial Scales ◽  
Local Context ◽  
Multiple Time Scales ◽  
Future Research ◽  
Multiple Time ◽  
Systems Research

Climate change is a product of the Anthropocene, and the human–nature system in which we live. Effective climate change adaptation requires that we acknowledge this complexity. Theoretical literature on sustainability transitions has highlighted this and called for deeper acknowledgment of systems complexity in our research practices. Are we heeding these calls for ‘systems’ research? We used hydrohazards (floods and droughts) as an example research area to explore this question. We first distilled existing challenges for complex human–nature systems into six central concepts: Uncertainty, multiple spatial scales, multiple time scales, multimethod approaches, human–nature dimensions, and interactions. We then performed a systematic assessment of 737 articles to examine patterns in what methods are used and how these cover the complexity concepts. In general, results showed that many papers do not reference any of the complexity concepts, and no existing approach addresses all six. We used the detailed results to guide advancement from theoretical calls for action to specific next steps. Future research priorities include the development of methods for consideration of multiple hazards; for the study of interactions, particularly in linking the short- to medium-term time scales; to reduce data-intensivity; and to better integrate bottom–up and top–down approaches in a way that connects local context with higher-level decision-making. Overall this paper serves to build a shared conceptualisation of human–nature system complexity, map current practice, and navigate a complexity-smart trajectory for future research.

On Approaches to Taking into Account the Risks of Changing Climatic Conditions when Planning and Implementing Oil and Gas Projects

2021 ◽  
Vol 18 (1) ◽  
pp. 52-65
Author(s):  
P. N. Mikheev
Keyword(s):  
Climate Change ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Climatic Conditions ◽  
Qualitative Assessment ◽  
Physical Factors ◽  
Gas Industry ◽  
Climate Risks ◽  
The Impact

The article discusses issues related to the impact of climate change on the objects of the oil and gas industry. The main trends in climate change on a global and regional (on the territory of Russian Federation) scale are outlined. Possible approaches to the identification and assessment of climate risks are discussed. The role of climatic risks as physical factors at various stages of development and implementation of oil and gas projects is shown. Based on the example of oil and gas facilities in the Tomsk region, a qualitative assessment of the level of potential risk from a weather and climatic perspective is given. Approaches to creating a risk management and adaptation system to climate change are presented.

scholarly journals Interlinkages between Urbanization and Climate Change: Identifying and Understanding the Challenges and the Prospects

2020 ◽  
Vol 31 (3) ◽  
pp. 285-300
Author(s):  
Abhinav Alakshendra ◽  
Arjun Kumar ◽  
Simi Mehta
Keyword(s):  
Climate Change ◽  
Urban Governance ◽  
Institutional Reforms ◽  
Rapid Urbanization ◽  
Role Of Government ◽  
Government Organizations ◽  
Urban Service ◽  
The Government ◽  
The Impact

India is urbanizing at an alarming rate and the impact of climate change is becoming more visible each passing day. The rapid urbanization and climate change have severe direct and indirect consequences, such as increasing poverty, inequality, massive displacement, public health concerns, and challenges of urban governance, among others. This paper identifies some of the most pressing issues faced by urban India in the context of climate change. It also details the interventions undertaken at the local, national, and international levels to counter the effect of the climate change. In addition, it critically evaluates the role of government organizations, especially in terms of undertaking regulatory and planning functions. The paper argues that the implementation of institutional reforms would enable the government to reach out to the private sector to improve urban service delivery. It also provides examples of best practices from India and the world in combating climate change through adaptation and mitigation approaches.Abstrak. India mengalami urbanisasi pada tingkat yang mengkhawatirkan dan dampak perubahan iklim menjadi terlihat setiap hari. Urbanisasi yang cepat dan perubahan iklim memiliki konsekuensi langsung dan tidak langsung yang parah, seperti antara lain meningkatnya kemiskinan, ketimpangan, pengungsian besar-besaran, masalah kesehatan masyarakat, dan tantangan tata kelola kota. Makalah ini mengidentifikasi beberapa masalah paling mendesak yang dihadapi oleh perkotaan India dalam konteks perubahan iklim. Makalah ini juga merinci intervensi yang dilakukan di tingkat lokal, nasional, dan internasional untuk melawan dampak perubahan iklim. Selain itu, secara kritis makalah ini mengevaluasi peran organisasi pemerintah, terutama dalam menjalankan fungsi pengaturan dan perencanaan. Makalah ini berpendapat bahwa pelaksanaan reformasi kelembagaan akan memungkinkan pemerintah menjangkau sektor swasta untuk membantu meningkatkan pelayanan perkotaan. Makalah ini juga memberikan contoh praktik terbaik dari India dan dunia dalam memerangi perubahan iklim melalui pendekatan adaptasi dan mitigasi.Kata kunci. Urbanisasi, perubahan iklim, keterkaitan, tata kelola kota, mitigasi.

scholarly journals Exploring farmers’ perception on climate-induced events and adaptation practices to protect crop production and livestock farming in Haor area of northeastern Bangladesh

2021 ◽  
Author(s):  
Tasneem Chowdhury Fahim ◽  
Bivuti Bhushan Sikder
Keyword(s):  
Climate Change ◽  
Crop Production ◽  
Coastal Region ◽  
Climate Extremes ◽  
Livestock Farming ◽  
Chi Square ◽  
Study Results ◽  
Tools And Techniques ◽  
Adaptation Practices ◽  
The Impact

Abstract Bangladesh is confronting terrible impacts of climate change on agriculture across the country, especially in the low-lying area like- Haor, coastal region, and islands. This behavioral study (N = 320) examines the perception and knowledge of farmers on climate-induced events and experiences, and explores the adaptation practices they adopt to protect crop production and livestock farming from the impact of climate change in the Northeastern Haor area of the country. Using triangulation method, it is detected that farmers of the study area have erroneous idea on climate change and the causes of frequent climate extremes. Study results show that respondents’ perception and experiences on climate-induced event are verified positively with the historical trend and time-series analysis of climate indicators as well as with the findings of researchers using PRA tools and techniques. This study explores the traditional and systematic adaptation approaches of farmers which are practiced in individual or community level. The rationale of each of the approach from respondents’ side is also analyzed in the study. It is statistically tested using chi-square that some of the scientific and systematic adaptation options for crop production is predominantly influenced by the educational qualifications of the respondents. The study reveals that lack of proper information prevents subsistence farmers to find the most effective adaptation pathways.

scholarly journals Entrepreneurial intention of engineering students: the role of motivations and barriers

2021 ◽  
Vol 5 (2) ◽  
pp. first
Author(s):  
Bich Huy Hai Bui ◽  
Minh Tien Pham
Keyword(s):  
Engineering Students ◽  
Positive Impact ◽  
Entrepreneurial Intention ◽  
Statistical Regression ◽  
Internal Factors ◽  
University Of Technology ◽  
Entrepreneurial Motivations ◽  
Using Data ◽  
The Impact

The purpose of this study is to explore perceptions of entrepreneurial motivations and barriers and to assess their influence on the entrepreneurial intention of engineering students. Using data of 350 respondents who are students at HCMC University of Technology, VNU-HCM, the study identifies the key motives and barriers towards entrepreneurship. The data are then subjected to statistical regression in order to identify causal relationships between the motivations, barriers, and entrepreneurial intention. The results indicate that creativity, independence, and economic motivation have a positive impact on entrepreneurial intention and that the most important motivator for the entrepreneurial intention of engineering students is creativity. On the contrary, lack of knowledge is the only barrier (an internal barrier) that impedes the students' intention of entrepreneurship. These results imply that the students' entrepreneurial intention is more affected by internal factors (for both motivations and barriers) than external factors. In terms of the relative power of the effects of motives and barriers on students' entrepreneurial intention, the results suggest that the impact of motivations is generally more powerful than that of barriers. The findings have important implications for educators and policymakers.

scholarly journals A RICARDIAN ANALYSIS OF THE IMPACT OF CLIMATE CHANGE ON PERMANENT CROPS IN A MEDITERRANEAN REGION

New Medit ◽  
2019 ◽  
Vol 18 (1) ◽  
pp. 41-51 ◽  
Author(s):  
Giuseppina Migliore ◽  
Cinzia Zinnanti ◽  
Emanuele Schimmenti ◽  
Valeria Borsellino ◽  
Giorgio Schifani ◽  
...  
Keyword(s):  
Climate Change ◽  
Mediterranean Region ◽  
Olive Tree ◽  
Mediterranean Area ◽  
Future Climate Change ◽  
Impact Of Climate Change ◽  
Farm Accountancy Data Network ◽  
Net Revenue ◽  
Using Data ◽  
The Impact

This is the first study which explores the impact of climate change in Sicily, a small Mediterranean region of Southern Europe. According to research, Mediterranean area has shown large climate shifts in the last century and it has been identified as one of the most prominent “Hot-Spots” in future climate change projections. Since agriculture is an economic activity which strongly depends on climate setting and is particularly responsive to climate changes, it is important to understand how such changes may affect agricultural profitability in the Mediterranean region. The aim of the present study is to assess the expected impact of climate change on permanent crops cultivated in Sicilian region (Southern Italy). By using data from Farm Accountancy Data Network and Ensembles climatic projections for 2021-2050 period, we showed that the impact of climate change is prominent in this region. However, crops respond to climatic variations in a different manner, highlighting that unlike the strong reduction in profitability of grapevine and citrus tree, the predicted average Net Revenue of olive tree is almost the same as in the reference period (1961-1990).

Evaluating the effect of climate change on snow load on structures

2019 ◽  
Author(s):  
Pietro Croce ◽  
Paolo Formichi ◽  
Filippo Landi ◽  
Francesca Marsili
Keyword(s):  
Climate Change ◽  
Climate Models ◽  
Regional Climate ◽  
Climate Extremes ◽  
Regional Climate Models ◽  
Extreme Weather Events ◽  
Uncertainty Range ◽  
Greenhouse Gasses ◽  
Weather Events ◽  
The Impact

<p>As consequence of global warming extreme weather events might become more frequent and severe across the globe. The evaluation of the impact of climate change on extremes is then a crucial issue for the resilience of infrastructures and buildings and is a key challenge for adaptation planning. In this paper, a suitable procedure for the estimation of future trends of climatic actions is presented starting from the output of regional climate models and taking into account the uncertainty in the model itself. In particular, the influence of climate change on ground snow loads is discussed in detail and the typical uncertainty range is determined applying an innovative algorithm for weather generation. Considering different greenhouse gasses emission scenarios, some results are presented for the Italian Mediterranean region proving the ability of the method to define factors of change for climate extremes also allowing a sound estimate of the uncertainty range associated with different models.</p>

Time-scale dependent mechanism of atmospheric CO2 concentration drivers of watershed water-energy balance

2021 ◽  
Author(s):  
Jing Zhao
Keyword(s):  
Energy Balance ◽  
River Basin ◽  
Time Scales ◽  
Time Scale ◽  
Hydrological Processes ◽  
Multiple Time Scales ◽  
Multiple Time ◽  
The Wei River Basin ◽  
Balance Dynamics ◽  
The Impact

&lt;p&gt;The elevated atmospheric carbon dioxide concentration (CO&lt;sub&gt;2&lt;/sub&gt;), as a key variable linking human activities and climate change, seriously affects the watershed hydrological processes. However, whether and how atmospheric CO&lt;sub&gt;2&lt;/sub&gt; influences the watershed water-energy balance dynamics at multiple time scales have not been revealed. Based on long-term hydrometeorological data, the variation of non-stationary parameter n series in the Choudhury's equation in the mainstream of the Wei River Basin (WRB), the Jing River Basin (JRB) and Beiluo River Basin (BLRB), three typical Loess Plateau regions in China, was examined. Subsequently, the Empirical Mode Decomposition method was applied to explore the impact of CO&lt;sub&gt;2&lt;/sub&gt; on watershed water-energy balance dynamics at multiple time scales. Results indicate that (1) in the context of warming and drying condition, annual n series in the WRB displays a significantly increasing trend, while that in the JRB and BLRB presents non-significantly decreasing trends; (2) the non-stationary n series was divided into 3-, 7-, 18-, exceeding 18-year time scale oscillations and a trend residual. In the WRB and BLRB, the overall variation of n was dominated by the residual, whereas in the JRB it was dominated by the 7-year time scale oscillation; (3) the relationship between CO&lt;sub&gt;2&amp;#160;&lt;/sub&gt;concentration and n series was significant in the WRB except for 3-year time scale. In the JRB, CO&lt;sub&gt;2&amp;#160;&lt;/sub&gt;concentration and n series were significantly correlated on the 7- and exceeding 7-year time scales, while in the BLRB, such a significant relationship existed only on the 18- and exceeding 18-year time scales. (4) CO&lt;sub&gt;2&lt;/sub&gt;-driven temperature rise and vegetation greening elevated the aridity index and evaporation ratio, thus impacting watershed water-energy balance dynamics. This study provided a deeper explanation for the possible impact of CO&lt;sub&gt;2&lt;/sub&gt; concentration on the watershed hydrological processes.&lt;/p&gt;

Arctic Plant Responses to Climate Warming: It’s Not all about Nitrogen

2018 ◽  
Author(s):  
Sanna Masud
Keyword(s):  
Climate Change ◽  
The Arctic ◽  
Plant Responses ◽  
Experimental Warming ◽  
Nutrient Pools ◽  
Research Attention ◽  
Low Arctic ◽  
Total Plant ◽  
The Impact ◽  
Deciduous Shrub

Climate change is increasing air and soil temperatures in the Arctic, likely enhancing microbial activity. Consequently, increased decomposition rates of soil organic matter and increasing nutrient supply to tundra vegetation can be expected. The impacts of experimental warming and fertilization on growth have been investigated by studying the availability of macronutrients such as N, P and C. However, other   macronutrients such as S, Ca, Mg, K, and micronutrients such as Fe, Mn, Cu, and Zn have received little research attention to determine their function, biogeochemical cycling, and effect on vegetation growth in response to warming. This study investigated the impact of experimental warming responses on availability and accumulation of the latter nutrients in the principal plant species located in mesic birch hummock tundra near Daring Lake, Northwest Territories in the Canadian Low Arctic Tundra. Plants were sampled in 2011 from the replicated summer greenhouse treatment that was established in 2004. In response to warming, the principal evergreen shrub (Rhododendron) had the most enhanced growth, followed by the deciduous shrub (Birch). Since the total plant pools of these nutrients were also enhanced in the evergreen, my results strongly suggest that availability of these nutrients was not limiting growth. By contrast, the birch total plant nutrient pools were not enhanced and significant decreases in Mg, S, and K leaf concentrations were observed, suggesting that these elements may be limiting birch growth. Together, our results suggest that plant growth response to climate change in the low Arctic may depend on previously overlooked nutrient elements, and that deciduous shrub growth may be constrained relative to the evergreen response as the arctic climate warms.

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