scholarly journals Applying simple water-energy balance frameworks to predict the climate sensitivity of streamflow over the continental United States

2012 ◽  
Vol 16 (8) ◽  
pp. 2531-2546 ◽  
Author(s):  
M. Renner ◽  
C. Bernhofer
Keyword(s):  
United States ◽  
Energy Balance ◽  
Climate Sensitivity ◽  
Energy Supply ◽  
Climate Changes ◽  
Climate Impacts ◽  
Statistical Classification ◽  
The Us ◽  
The Impact

Abstract. The prediction of climate effects on terrestrial ecosystems and water resources is one of the major research questions in hydrology. Conceptual water-energy balance models can be used to gain a first order estimate of how long-term average streamflow is changing with a change in water and energy supply. A common framework for investigation of this question is based on the Budyko hypothesis, which links hydrological response to aridity. Recently, Renner et al. (2012) introduced the climate change impact hypothesis (CCUW), which is based on the assumption that the total efficiency of the catchment ecosystem to use the available water and energy for actual evapotranspiration remains constant even under climate changes. Here, we confront the climate sensitivity approaches (the Budyko approach of Roderick and Farquhar, 2011, and the CCUW) with data of more than 400 basins distributed over the continental United States. We first estimate the sensitivity of streamflow to changes in precipitation using long-term average data of the period 1949 to 2003. This provides a hydro-climatic status of the respective basins as well as their expected proportional effect to changes in climate. Next, we test the ability of both approaches to predict climate impacts on streamflow by splitting the data into two periods. We (i) analyse the long-term average changes in hydro-climatology and (ii) derive a statistical classification of potential climate and basin change impacts based on the significance of observed changes in runoff, precipitation and potential evapotranspiration. Then we (iii) use the different climate sensitivity methods to predict the change in streamflow given the observed changes in water and energy supply and (iv) evaluate the predictions by (v) using the statistical classification scheme and (vi) a conceptual approach to separate the impacts of changes in climate from basin characteristics change on streamflow. This allows us to evaluate the observed changes in streamflow as well as to assess the impact of basin changes on the validity of climate sensitivity approaches. The apparent increase of streamflow of the majority of basins in the US is dominated by an increase in precipitation. It is further evident that impacts of changes in basin characteristics appear simultaneously with climate changes. There are coherent spatial patterns with catchments where basin changes compensate for climatic changes being dominant in the western and central parts of the US. A hot spot of basin changes leading to excessive runoff is found within the US Midwest. The impact of basin changes on the prediction is large and can be twice as much as the observed change signal. Although the CCUW and the Budyko approach yield similar predictions for most basins, the data of water-limited basins support the Budyko framework rather than the CCUW approach, which is known to be invalid under limiting climatic conditions.

scholarly journals Applying a simple water-energy balance framework to predict the climate sensitivity of streamflow over the continental United States

2011 ◽  
Vol 8 (6) ◽  
pp. 10825-10862 ◽  
Author(s):  
M. Renner ◽  
C. Bernhofer
Keyword(s):  
United States ◽  
Energy Balance ◽  
Climate Sensitivity ◽  
Energy Supply ◽  
Climate Changes ◽  
Total Efficiency ◽  
Climate Trend ◽  
The Us ◽  
The Impact

Abstract. The prediction of climate effects on terrestrial ecosystems and water resources is one of the major research questions in hydrology. Conceptual water-energy balance models can be used to gain a first order estimate of how long-term average streamflow is changing with a change in water and energy supply. A common framework for investigation of this question is based on the Budyko hypothesis, which links hydrological response to aridity. Recently, Renner et al. (2011) introduced the CCUW hypothesis, which is based on the assumption that the total efficiency of the catchment ecosystem to use the available water and energy for actual evapotranspiration remains constant even under climate changes. Here, we confront the climate sensitivity approaches (including several versions of Budyko's approach and the CCUW) with data of more than 400 basins distributed over the continental United States. We first map an estimate of the sensitivity of streamflow to changes in precipitation using long-term average data of the period 1949–2003. This provides a hydro-climatic status of the respective basins as well as their expected proportional effect on changes in climate. Next, by splitting the data in two periods, we (i) analyse the long-term average changes in hydro-climatolgy, we (ii) use the different climate sensitivity methods to predict the change in streamflow given the observed changes in water and energy supply and (iii) we apply a quantitative approach to separate the impacts of changes in the long-term average climate from basin characteristics change on streamflow. This allows us to evaluate the observed changes in streamflow as well as to evaluate the impact of basin changes on the validity of climate sensitivity approaches. The apparent increase of streamflow in the majority of basins in the US is dominated by a climate trend towards increased humidity. It is further evident that impacts of changes in basin characteristics appear in parallel with climate changes. There are coherent spatial patterns with basins of increasing catchment efficiency being dominant in the western and central parts of the US. A hot spot of decreasing efficiency is found within the US Midwest. The impact of basin changes on the prediction is large and can be twice as the observed change signal. However, we find that both, the CCUW hypothesis and the approaches using the Budyko hypothesis, show minimal deviations between observed and predicted changes in streamflow for basins where a dominance of climatic changes and low influences of basin changes have been found. Thus, climate sensitivity methods can be regarded as valid tools if we expect climate changes only and neglect any direct anthropogenic influences.

scholarly journals The impact of Sino-US trade friction on Sino-Russian soybean trade cooperation

2021 ◽  
Vol 204 (01) ◽  
pp. 91-98
Author(s):  
Cyucze Chen'
Keyword(s):  
United States ◽  
The United States ◽  
Agricultural Trade ◽  
Trade Friction ◽  
The Us ◽  
Belt And Road ◽  
Trade Frictions ◽  
The Impact ◽  
Soybean Trade

Abstract. Since entering the 21st century, trade frictions between China and the United States have occurred frequently. In response to the escalation of the US provocation, China began to impose a 25 % tariff on US soybeans. The hindrance of Sino-US soybean trade has brought new opportunities for the development of Sino-Russian soybean trade. Purpose. This article analyzes the current situation of China-Russia soybean trade cooperation in the context of Sino-US trade frictions, and analyzes the current constraints and favorable opportunities in the development of the Sino-Russian soybean trade industry. Methods. The study used monographic, abstract-logical methods and the method of comparative analysis. Results. It can be said that Sino-US trade friction has objectively injected new momentum into Sino-Russian agricultural cooperation, and soybeans have become a new growth point in Sino-Russian agricultural cooperation. In the context of the “Belt and Road” initiative and the long-term trade competition between China and the United States, it is of great significance to further strengthen Sino-Russian agricultural cooperation and increase the level of agricultural trade represented by soybeans between the two countries. The scientific novelty of the research lies in the analysis of limited factors of influence and indication of a new direction of cooperation in the field of soybeans between the PRC and the Russian Federation.

scholarly journals Divergent Patterns and Trends in Breast Cancer Incidence, Mortality and Survival Among Older Women in Germany and the United States

Cancers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2419
Author(s):  
Lina Jansen ◽  
Bernd Holleczek ◽  
Klaus Kraywinkel ◽  
Janick Weberpals ◽  
Chloé Charlotte Schröder ◽  
...  
Keyword(s):  
Breast Cancer ◽  
United States ◽  
Cancer Incidence ◽  
Mammography Screening ◽  
Breast Cancer Incidence ◽  
Relative Survival ◽  
The United States ◽  
The Us ◽  
The Impact

Background: Breast cancer treatment has changed tremendously over the last decades. In addition, the use of mammography screening for early detection has increased strongly. To evaluate the impact of these developments, long-term trends in incidence, mortality, stage distribution and survival were investigated for Germany and the United States (US). Methods: Using population-based cancer registry data, long-term incidence and mortality trends (1975–2015), shifts in stage distributions (1998–2015), and trends in five-year relative survival (1979–2015) were estimated. Additionally, trends in five-year relative survival after standardization for stage were explored (2004–2015). Results: Age-standardized breast cancer incidence rates were much higher in the US than in Germany in all periods, whereas age-standardized mortality began to lower in the US from the 1990s on. The largest and increasing differences were observed for patients aged 70+ years with a 19% lower incidence but 45% higher mortality in Germany in 2015. For this age group, large differences in stage distributions were observed, with 29% (Germany) compared to 15% (US) stage III and IV patients. Age-standardized five-year relative survival increased strongly between 1979–1983 and 2013–2015 in Germany (+17% units) and the US (+19% units) but was 9% units lower in German patients aged 70+ years in 2013–2015. This difference was entirely explained by differences in stage distributions. Conclusions: Overall, our results are in line with a later uptake and less extensive utilization of mammography screening in Germany. Further studies and efforts are highly needed to further explore and overcome the increased breast cancer mortality among elderly women in Germany.

The Impact of Monetary and Fiscal Policies on the Stock Market in the United States (U.S); Evidence from Linear ARDL Framework

2020 ◽  
Vol 11 (1) ◽  
pp. 132-132
Author(s):  
Aref Emamian
Keyword(s):  
United States ◽  
Stock Market ◽  
The United States ◽  
Real Effective Exchange Rate ◽  
Annual Data ◽  
Fiscal Policies ◽  
Long Run ◽  
The Us ◽  
Short Run ◽  
The Impact

This study examines the impact of monetary and fiscal policies on the stock market in the United States (US), were used. By employing the method of Autoregressive Distributed Lags (ARDL) developed by Pesaran et al. (2001). Annual data from the Federal Reserve, World Bank, and International Monetary Fund, from 1986 to 2017 pertaining to the American economy, the results show that both policies play a significant role in the stock market. We find a significant positive effect of real Gross Domestic Product and the interest rate on the US stock market in the long run and significant negative relationship effect of Consumer Price Index (CPI) and broad money on the US stock market both in the short run and long run. On the other hand, this study only could support the significant positive impact of tax revenue and significant negative impact of real effective exchange rate on the US stock market in the short run while in the long run are insignificant. Keywords: ARDL, monetary policy, fiscal policy, stock market, United States

THE INFLUENCE OF SCOTTISH ACCOUNTANTS IN THE UNITED STATES: THE EARLY CASE OF THE SOCIETY OF ACCOUNTANTS IN EDINBURGH

1997 ◽  
Vol 24 (1) ◽  
pp. 117-141 ◽  
Author(s):  
T. A. LEE
Keyword(s):  
United States ◽  
General Theory ◽  
Research Program ◽  
The United States ◽  
The World ◽  
Early Case ◽  
The Impact ◽  
Chartered Accountants ◽  
The U.S

This study represents part of a long-term research program to investigate the influence of U.K. accountants on the development of professional accountancy in other parts of the world. It examines the impact of a small group of Scottish chartered accountants who emigrated to the U.S. in the late 1800s and early 1900s. Set against a general theory of emigration, the study's main results reveal the significant involvement of this group in the founding and development of U.S. accountancy. The influence is predominantly with respect to public accountancy and its main institutional organizations. Several of the individuals achieved considerable eminence in U.S. public accountancy.

From Start-Up to Scale-Up

2018 ◽  
Author(s):  
Gilles Duruflé ◽  
Thomas Hellmann ◽  
Karen Wilson
Keyword(s):  
United States ◽  
Conceptual Framework ◽  
Public Policies ◽  
Scale Up ◽  
The United States ◽  
Smart Money ◽  
Start Up ◽  
The Us ◽  
The Creation

This chapter examines the challenge for entrepreneurial companies of going beyond the start-up phase and growing into large successful companies. We examine the long-term financing of these so-called scale-up companies, focusing on the United States, Europe, and Canada. The chapter first provides a conceptual framework for understanding the challenges of financing scale-ups. It emphasizes the need for investors with deep pockets, for smart money, for investor networks, and for patient money. It then shows some data about the various aspects of financing scale-ups in the United States, Europe, and Canada, showing how Europe and Canada are lagging behind the US relatively more at the scale-up than the start-up stage. Finally, the chapter raises the question of long-term public policies for supporting the creation of a better scale-up environment.

scholarly journals The Impact of Function Focused Care From Acute Care to Home Care and Nursing Homes

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 629-629
Author(s):  
Silke Metzelthin ◽  
Sandra Zwakhalen ◽  
Barbara Resnick
Keyword(s):  
Older Adults ◽  
The Netherlands ◽  
Home Care ◽  
Acute Care ◽  
Long Term Care ◽  
Functional Decline ◽  
Term Care ◽  
The Us ◽  
The Impact

Abstract Functional decline in older adults often lead towards acute or long-term care. In practice, caregivers often focus on completion of care tasks and of prevention of injuries from falls. This task based, safety approach inadvertently results in fewer opportunities for older adults to be actively involved in activities. Further deconditioning and functional decline are common consequences of this inactivity. To prevent or postpone these consequences Function Focused Care (FFC) was developed meaning that caregivers adapt their level of assistance to the capabilities of older adults and stimulate them to do as much as possible by themselves. FFC was first implemented in institutionalized long-term care in the US, but has spread rapidly to other settings (e.g. acute care), target groups (e.g. people with dementia) and countries (e.g. the Netherlands). During this symposium, four presenters from the US and the Netherlands talk about the impact of FFC. The first presentation is about the results of a stepped wedge cluster trial showing a tendency to improve activities of daily living and mobility. The second presentation is about a FFC training program. FFC was feasible to implement in home care and professionals experienced positive changes in knowledge, attitude, skills and support. The next presenter reports about significant improvements regarding time spent in physical activity and a decrease in resistiveness to care in a cluster randomized controlled trial among nursing home residents with dementia. The fourth speaker presents the content and first results of a training program to implement FFC in nursing homes. Nursing Care of Older Adults Interest Group Sponsored Symposium

scholarly journals The Convergence of Military Conduct and Policing in Israeli-Controlled Territories

2020 ◽  
Vol 35 (2) ◽  
pp. 1-8
Author(s):  
Nir Gazit ◽  
Keyword(s):  
United States ◽  
Police Officer ◽  
The United States ◽  
Police Brutality ◽  
Media Attention ◽  
Military Forces ◽  
The Us ◽  
The Military ◽  
The Impact

The murder of George Floyd by a police officer in the United States in May 2020 and the subsequent turmoil, as well as the violence against migrants on the US-Mexican border, have drawn major public and media attention to the phenomenon of police brutality (see, e.g., Levin 2020; Misra 2018; Taub 2020), which is often labeled as ‘militarization of police’. At the same time, in recent years military forces have been increasingly involved in policing missions in civilian environments, both domestically (see, e.g., Kanno-Youngs 2020; Schrader 2020; Shinkman 2020) and abroad. The convergence of military conduct and policing raises intriguing questions regarding the impact of these tendencies on the military and the police, as well as on their legitimacy.

scholarly journals The Influence of Logistics Mode on Cross Border E-commerce Business Scale

2021 ◽  
Vol 235 ◽  
pp. 03006
Author(s):  
Xiaohui Hu
Keyword(s):  
United States ◽  
Regression Analysis ◽  
The United States ◽  
Intermodal Transportation ◽  
Road Transportation ◽  
Cross Border ◽  
Logistics Mode ◽  
Transportation Logistics ◽  
The Impact

China’s cross-border e-commerce companies are facing the problem of high logistics cost caused by excessive reliance on road transportation in domestic logistics link. In the long-term development, crossborder e-commerce companies in the United States have adopted the intermodal transportation logistics mode, which can reduced the domestic logistics costs. In order to study the impact of intermodal-transportation logistics mode on the scale of cross-border e-commerce companies, this paper selects the relevant data of Hub Group, the first intermodal marketing company in North America, makes multiple regression analysis, and draws the following conclusion: the intermodal-transportation logistics mode of highway and railway collaborative transportation is conducive to the expansion of cross-border e-commerce business scale.

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