Zobrazeno 1 - 10
of 538
pro vyhledávání: '"S. Lovejoy"'
Publikováno v:
Climate of the Past, Vol 20, Pp 1579-1594 (2024)
Temperature and mineral dust records serve as valuable palaeoclimatic indicators for studying atmospheric variability across different temporal scales. In this study, we employed Haar fluctuations to analyse global spatiotemporal atmospheric variabil
Externí odkaz:
https://doaj.org/article/7decff9973024d3bbde57460d479fd0b
Autor:
S. Lovejoy
Publikováno v:
Nonlinear Processes in Geophysics, Vol 30, Pp 311-374 (2023)
Until the 1980s, scaling notions were restricted to self-similar homogeneous special cases. I review developments over the last decades, especially in multifractals and generalized scale invariance (GSI). The former is necessary for characterizing an
Externí odkaz:
https://doaj.org/article/a4e72b180a03477eb899ffceb17c5e4c
Autor:
S. Lovejoy
Publikováno v:
Nonlinear Processes in Geophysics, Vol 29, Pp 93-121 (2022)
We consider the statistical properties of solutions of the stochastic fractional relaxation equation and its fractionally integrated extensions that are models for the Earth's energy balance. In these equations, the highest-order derivative term is f
Externí odkaz:
https://doaj.org/article/d41324a1a83142a38d80997f5c792105
Publikováno v:
Earth System Dynamics, Vol 13, Pp 81-107 (2022)
We produce climate projections through the 21st century using the fractional energy balance equation (FEBE): a generalization of the standard energy balance equation (EBE). The FEBE can be derived from Budyko–Sellers models or phenomenologically th
Externí odkaz:
https://doaj.org/article/f8398100ca48487c9d62aec1a146239a
Autor:
S. Lovejoy
Publikováno v:
AGU Advances, Vol 3, Iss 6, Pp n/a-n/a (2022)
Abstract One half of 2021s Nobel Physics prize was awarded to statistical physicist Giorgio Parisi and the other—the first in geophysics in 75 years—to climate scientists Syukoro Manabe and Klaus Hasselmann, the former for pioneering General Circ
Externí odkaz:
https://doaj.org/article/da80bdc308b5449eac48c50961f535f3
Autor:
S. Lovejoy
Publikováno v:
Earth System Dynamics, Vol 12, Pp 469-487 (2021)
The original Budyko–Sellers type of 1D energy balance models (EBMs) consider the Earth system averaged over long times and apply the continuum mechanics heat equation. When these and the more phenomenological box models are extended to include time
Externí odkaz:
https://doaj.org/article/0ea8fb89b843485dafaf6b486d8dc8b2
The half-order energy balance equation – Part 2: The inhomogeneous HEBE and 2D energy balance models
Autor:
S. Lovejoy
Publikováno v:
Earth System Dynamics, Vol 12, Pp 489-511 (2021)
In Part 1, I considered the zero-dimensional heat equation, showing quite generally that conductive–radiative surface boundary conditions lead to half-ordered derivative relationships between surface heat fluxes and temperatures: the half-ordered e
Externí odkaz:
https://doaj.org/article/df75dccbc11e4584bf726cdaca88cbb0
Autor:
S. Lovejoy, F. Lambert
Publikováno v:
Climate of the Past, Vol 15, Pp 1999-2017 (2019)
Atmospheric variability as a function of scale has been divided in various dynamical regimes with alternating increasing and decreasing fluctuations: weather, macroweather, climate, macroclimate, and megaclimate. Although a vast amount of data are av
Externí odkaz:
https://doaj.org/article/49ba7813909143f2882a19ce7f8d6842
Autor:
S. Lovejoy
Publikováno v:
Scientific Reports, Vol 8, Iss 1, Pp 1-13 (2018)
Abstract It was recently found that the accepted picture of atmospheric variability was in error by a large factor. Rather than being dominated by a series of narrow scale-range quasi-oscillatory processes with an unimportant white noise “backgroun
Externí odkaz:
https://doaj.org/article/72afe5a9ef004eb89ab0b2cfb6062f24
Autor:
S. Lovejoy, C. Varotsos
Publikováno v:
Earth System Dynamics, Vol 7, Iss 1, Pp 133-150 (2016)
At scales much longer than the deterministic predictability limits (about 10 days), the statistics of the atmosphere undergoes a drastic transition, the high-frequency weather acts as a random forcing on the lower-frequency macroweather. In addition,
Externí odkaz:
https://doaj.org/article/b97a46758ccf4f4b8f821a64a91c1b72