Results 121 to 130 of about 23,472 (239)

Future Drought Will Lead to a Decrease in Vegetation Resilience in China

Earth's Future, Volume 14, Issue 5, May 2026.
Abstract The interactions between climate change and socioeconomic development have led to significant changes in vegetation resilience in response to drought in China. However, an understanding of the changes in vegetation resilience in response to drought events under different future scenarios (SSP126, SSP245, SSP370, and SSP585) is lacking. Drought
Liangliang Jiang, Wenli Liu, Zhenping Tan, Xiaowen Xu, Xinyuan Gui, Rui Liu   +5 more
wiley   +1 more source

Bayesian‐Belief Direct Policy Search for Adaptive Water Supply Planning With Endogenous Learning

Water Resources Research, Volume 62, Issue 5, May 2026.
Abstract Climate change uncertainty challenges water supply planning, where long‐lived infrastructure must ensure reliable supply under evolving conditions. Adaptive planning addresses this by incrementally expanding infrastructure only as needed, reducing unnecessary investments.
Mofan Zhang, Megan Lickley, Marta Zaniolo, Arjun Nellikkattil, Sarah Fletcher   +4 more
wiley   +1 more source

A Test Strategy for Spurious Spatial Regression, Spatial Nonstationarity, and Spatial Cointegration [PDF]

A test strategy consisting of a twofold application of a Lagrange Multiplier test is suggested as a device to reveal spatial nonstationarity and spurious spatial regeression. It is further illustrated how the test strategy can be used as a diagnostic for
Jorgen Lauridsen, Reinhold Kosfeld
core  

Multi‐Decadal Trends in the Low Latitude foF2 Driven by Secular Magnetic Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Long‐term ionospheric trends have been widely studied, but their origin and magnitude remain subjects of debate. This study quantifies the linear trend in the F2‐region critical frequency (foF2) and its local time dependence using observations from eight low‐latitude ionosonde stations.
D. Singh, S. R. Zhang, L. P. Goncharenko, I. S. Batista, A. J. Coster   +4 more
wiley   +1 more source

Time series behavior of the short-term real interest rates in industrial countries [PDF]

With quarterly data of a sample period starting from 1973, the conventional unit root tests reject the null of nonstationarity in favor of the alternative of linear stationarity for short-term real interest rates (RIRs) of non-European industrial ...
Su Zhou
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Physical and Unphysical Causes of Nonstationarity in the Relationship Between Barents‐Kara Sea Ice and the North Atlantic Oscillation

Geophysical Research Letters
The role of internal variability in generating an apparent link between autumn Barents‐Kara sea (BKS) ice and the winter North Atlantic Oscillation (NAO) has been intensely debated.
Kristian Strommen, Fenwick C. Cooper
doaj   +1 more source

Price Discovery in Bitcoin ETF Market

Financial Review, Volume 61, Issue 2, Page 435-449, May 2026.
ABSTRACT In this study, we explore price discovery across the following three Bitcoin markets: spot, futures, and exchange‐traded funds (ETFs). Employing the fractionally cointegrated vector autoregressive (FCVAR) model, we estimate price discovery in each market using minute‐level price data from October 19, 2021, the launch date of the first US ...
Kiana Kia, Bo Liu, Qian Li, Victor Song, Ke Xu   +4 more
wiley   +1 more source

Estimation of Change Points for Non‐Linear (Auto‐)Regressive Processes Using Neural Network Functions

Journal of Time Series Analysis, Volume 47, Issue 3, Page 539-556, May 2026.
ABSTRACT In this paper, we propose a new test for the detection of a change in a non‐linear (auto‐)regressive time series as well as a corresponding estimator for the unknown time point of the change. To this end, we consider an at‐most‐one‐change model and approximate the unknown (auto‐)regression function by a neural network with one hidden layer. It
Claudia Kirch, Stefanie Schwaar
wiley   +1 more source

Aridity and drought: distinct concepts often conflated in ecological research

New Phytologist, Volume 250, Issue 4, Page 2026-2038, May 2026.
Summary As well‐established drivers of ecological pattern and process, aridity and drought are linked by a common focus on water limitation – with both aridity and especially drought projected to increase in extent and severity with climate change. There is a long history of assessing plant adaptations to drought through the lens of aridity. Consistent
Alan K. Knapp, Abbey Chatwin, Jenna E. Gardner, Anna Hall, Adriana Jacobi, Scott Otto, J. Alexander Siggers, Joseph G. Toman, E. Greg Tooley, Robert J. Griffin‐Nolan   +9 more
wiley   +1 more source

Rissanen's Theorem and Econometric Time Series [PDF]

In a typical empirical modeling context, the data generating process (DGP) of a time series is assumed to be known up to a finite-dimensional parameter.
Peter C.B. Phillips, Werner Ploberger
core