scholarly journals The Role of Internal Variability in Twenty‐First‐Century Projections of the Seasonal Cycle of Northern Hemisphere Surface Temperature

2018 ◽  
Vol 123 (23) ◽  
Author(s):  
Vineel Yettella ◽  
Mark R. England
Keyword(s):  
Surface Temperature ◽  
Northern Hemisphere ◽  
Seasonal Cycle ◽  
Internal Variability ◽  
First Century ◽  
Hemisphere Surface ◽  
Twenty First Century

scholarly journals Projected Changes in the Seasonal Cycle of Surface Temperature

2012 ◽  
Vol 25 (18) ◽  
pp. 6359-6374 ◽  
Author(s):  
John G. Dwyer ◽  
Michela Biasutti ◽  
Adam H. Sobel
Keyword(s):  
Heat Capacity ◽  
Sea Ice ◽  
Surface Temperature ◽  
Seasonal Cycle ◽  
Phase Delay ◽  
First Century ◽  
Effective Heat Capacity ◽  
Effective Heat ◽  
Twenty First Century ◽  
Global Mean

Abstract When forced with increasing greenhouse gases, global climate models project a delay in the phase and a reduction in the amplitude of the seasonal cycle of surface temperature, expressed as later minimum and maximum annual temperatures and greater warming in winter than in summer. Most of the global mean changes come from the high latitudes, especially over the ocean. All 24 Coupled Model Intercomparison Project phase 3 models agree on these changes and, over the twenty-first century, average a phase delay of 5 days and an amplitude decrease of 5% for the global mean ocean surface temperature. Evidence is provided that the changes are mainly driven by sea ice loss: as sea ice melts during the twenty-first century, the previously unexposed open ocean increases the effective heat capacity of the surface layer, slowing and damping the temperature response. From the tropics to the midlatitudes, changes in phase and amplitude are smaller and less spatially uniform than near the poles but are still prevalent in the models. These regions experience a small phase delay but an amplitude increase of the surface temperature cycle, a combination that is inconsistent with changes to the effective heat capacity of the system. The authors propose that changes in this region are controlled by changes in surface heat fluxes.

scholarly journals Quantifying the Uncertainty in Historical and Future Simulations of Northern Hemisphere Spring Snow Cover

2016 ◽  
Vol 29 (23) ◽  
pp. 8647-8663 ◽  
Author(s):  
Chad W. Thackeray ◽  
Christopher G. Fletcher ◽  
Lawrence R. Mudryk ◽  
Chris Derksen
Keyword(s):  
Snow Cover ◽  
Northern Hemisphere ◽  
Climate Model ◽  
Coupled Model ◽  
Internal Variability ◽  
Winter Precipitation ◽  
First Century ◽  
Internal Climate Variability ◽  
Snow Cover Extent ◽  
Twenty First Century

Abstract Projections of twenty-first-century Northern Hemisphere (NH) spring snow cover extent (SCE) from two climate model ensembles are analyzed to characterize their uncertainty. Phase 5 of the Coupled Model Intercomparison Project (CMIP5) multimodel ensemble exhibits variability resulting from both model differences and internal climate variability, whereas spread generated from a Canadian Earth System Model–Large Ensemble (CanESM-LE) experiment is solely a result of internal variability. The analysis shows that simulated 1981–2010 spring SCE trends are slightly weaker than observed (using an ensemble of snow products). Spring SCE is projected to decrease by −3.7% ± 1.1% decade−1 within the CMIP5 ensemble over the twenty-first century. SCE loss is projected to accelerate for all spring months over the twenty-first century, with the exception of June (because most snow in this month has melted by the latter half of the twenty-first century). For 30-yr spring SCE trends over the twenty-first century, internal variability estimated from CanESM-LE is substantial, but smaller than intermodel spread from CMIP5. Additionally, internal variability in NH extratropical land warming trends can affect SCE trends in the near future (R2 = 0.45), while variability in winter precipitation can also have a significant (but lesser) impact on SCE trends. On the other hand, a majority of the intermodel spread is driven by differences in simulated warming (dominant in March–May) and snow cover available for melt (dominant in June). The strong temperature–SCE linkage suggests that model uncertainty in projections of SCE could be potentially reduced through improved simulation of spring season warming over land.

scholarly journals Corporate headquarters in the twenty-first century: an organization design perspective

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Sven Kunisch ◽  
Markus Menz ◽  
David Collis
Keyword(s):  
Twentieth Century ◽  
Organization Design ◽  
Business Environment ◽  
First Century ◽  
Future Research ◽  
Corporate Headquarters ◽  
Special Collection ◽  
Design Perspective ◽  
Twenty First Century

Abstract The corporate headquarters (CHQ) of the multi-business enterprise, which emerged as the dominant organizational form for the conduct of business in the twentieth century, has attracted considerable scholarly attention. As the business environment undergoes a fundamental transition in the twenty-first century, we believe that understanding the evolving role of the CHQ from an organization design perspective will offer unique insights into the nature of business activity in the future. The purpose of this article, in keeping with the theme of the Journal of Organization Design Special Collection, is thus to invigorate research into the CHQ. We begin by explicating four canonical questions related to the design of the CHQ. We then survey fundamental changes in the business environment occurring in the twenty-first century, and discuss their potential implications for CHQ design. When suitable here we also refer to the contributions published in our Special Collection. Finally, we put forward recommendations for advancements and new directions for future research to foster a deeper and broader understanding of the topic. We believe that we are on the cusp of a change in the CHQ as radical as that which saw its initial emergence in the late nineteenth/early twentieth century. Exactly what form that change will take remains for practitioners and researchers to inform.

The Role of Education Colleges in Yemeni Universities to Develop Twenty-First Century Skills among Students

2021 ◽  
Vol 14 (47) ◽  
pp. 103-130
Author(s):  
عبد الغني أحمد علي الحاوري ◽  
محمد عبد الله حسن حميد
Keyword(s):  
Creative Thinking ◽  
Effective Communication ◽  
First Century ◽  
Self Management ◽  
Colleges Of Education ◽  
Use Of Technology ◽  
Study Results ◽  
Twenty First Century ◽  
Twenty First Century Skills

The study aimed to examine the role of colleges of education in Yemeni universities in developing the twenty-first century skills among students. The skills include critical thinking and problem-solving; creative thinking; effective communication and cooperation with others; flexibility; adaptation and change management; self and continuous learning; leadership and working with a team; taking responsibility and making decisions; using technology efficiently; understanding and interacting with diverse cultures; and work and self-management. The followed the descriptive and analytical method, using a questionnaire that was distributed to a random sample of (408) students selected from the fourth level of the Faculties of Education in four public universities: Sana'a, Hajjah, Amran, and Hodeidah.  The study results revealed a medium role that the colleges of education in Yemeni universities play in developing the twenty-first century skills among their students. The skill of effective communication and cooperation with others received the highest attention, while the skills of work, self-management and the skills of using technology efficiently received the lowest level of attention.  The study concluded with a number of conclusions, including absence of a vision for the challenges and requirements of the twenty-first century and lack of support provided to colleges to purchase facilities and equipment. The study recommended that the colleges of education should pay more attention to developing the twenty-first century skills, especially work and self-management skills and the efficient use of technology. Keywords: role, education college, skills, twenty-first century, Yemeni universities.

The concept of the frame in philosophical terms – the role of time and memory in human existence

2020 ◽  
Vol 2 ◽  
pp. 193-201
Author(s):  
Katarzyna Olewińska
Keyword(s):  
Martin Heidegger ◽  
William Faulkner ◽  
Human Life ◽  
Human Existence ◽  
First Century ◽  
Henri Bergson ◽  
Sound And The Fury ◽  
Twenty First Century ◽  
Time Frames

In The Sound and the Fury William Faulkner writes: “Time is dead as long as it is being clicked off by little wheels; only when the clock stops, does time come to life.” The following words relate to the role of memory frames in human life. They also begin the analysis of the ideas of twentieth and twenty-first century philosophers such as Henri Bergson, Martin Heidegger, Paul Ricoeur and David Farrell Krell. Even though there is a strict reference to the Modernist thinkers, the author goes slightly deeper, reminding earlier concepts of Plato, Socrates, Aristotle and Protagoras. The second part of the article has been devoted to the notions connected with time frames and memory such as experiencing of the passage of time, reminding, forgetting, forgiving as well as postmemory.

Transfer or Translation? Rethinking Traveling Technologies from the Global South

2022 ◽  
pp. 016224392110722
Author(s):  
Miao Lu ◽  
Jack Linchuan Qiu
Keyword(s):  
Technology Transfer ◽  
Conceptual Framework ◽  
Global South ◽  
First Century ◽  
Technical Approach ◽  
Narrow Focus ◽  
New Space ◽  
Twenty First Century ◽  
Human Actors

Technology flows are becoming increasingly diverse in the twenty-first century, calling for an update of concepts and frameworks. Reflecting on the inherent tensions of technology transfer, including its technocratic dreams, insensitivity to technological materiality, and narrow focus on certain human actors, we propose technology translation as a complementary conceptual framework to understand traveling technologies. Taking a socio-technical approach, technology translation views artifacts as socially shaped with distributed agency, which makes technology flows unstable and unpredictable. In so doing, we develop a typology to explain five technology flow scenarios, shedding new light on the mechanisms of technology traveling by foregrounding the role of translators. Last, we discuss the politics of translation and elaborate how technology translation opens new space to engage with the complexity and uncertainty of technology flows, especially in the Global South.

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