Zobrazeno 1 - 10
of 307
pro vyhledávání: '"P. J. Chapman"'
Autor:
I. L. Lloyd, R. Morrison, R. P. Grayson, A. M. J. Cumming, B. D'Acunha, M. V. Galdos, C. D. Evans, P. J. Chapman
Publikováno v:
GCB Bioenergy, Vol 16, Iss 7, Pp n/a-n/a (2024)
Abstract The area of land dedicated to growing maize for bioenergy in the United Kingdom is rapidly expanding. To understand how maize production influences soil carbon (C) dynamics, and whether this is influenced by soil type, we measured net ecosys
Externí odkaz:
https://doaj.org/article/a107e2d8f8f84f5b9a13c44c06b30f43
Autor:
J. Williamson, C. Evans, B. Spears, A. Pickard, P. J. Chapman, H. Feuchtmayr, F. Leith, S. Waldron, D. Monteith
Publikováno v:
Biogeosciences, Vol 20, Pp 3751-3766 (2023)
In the UK, most large reservoirs constructed for public water supply are in upland areas. Many are situated in catchments characterised by organic-rich soils, including peatlands. Although these soils naturally leach large amounts of dissolved organi
Externí odkaz:
https://doaj.org/article/e3318bd561d14e2ea10da37bdf9dd2f3
Autor:
Dafydd M. O. Elias, Kelly E. Mason, Tim Goodall, Ashley Taylor, Pengzhi Zhao, Alba Otero-Fariña, Hongmei Chen, Caroline L. Peacock, Nicholas J. Ostle, Robert Griffiths, Pippa J. Chapman, Joseph Holden, Steve Banwart, Niall P. McNamara, Jeanette Whitaker
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-15 (2024)
Abstract Current understanding of soil carbon dynamics suggests that plant litter quality and soil mineralogy control the formation of mineral-associated soil organic carbon (SOC). Due to more efficient microbial anabolism, high-quality litter may pr
Externí odkaz:
https://doaj.org/article/ce39d1c83f1642a891ba794e08408385
Autor:
M. Lester, P. J. Chapman, S. W. H. Cowley, S. J. Crooks, J. A. Davies, P. Hamadyk, K. A. McWilliams, S. E. Milan, M. J. Parsons, D. B. Payne, E. C. Thomas, J. D. Thornhill, N. M. Wade, T. K. Yeoman, R. J. Barnes
Publikováno v:
Annales Geophysicae, Vol 22, Pp 459-473 (2004)
The Super Dual Auroral Radar Network (SuperDARN), which consists of networks of HF radars surrounding the northern and southern poles, has proven to be an extremely successful experimental technique in a wide range of scientific areas. The basic d
Externí odkaz:
https://doaj.org/article/f683378ef3a847c1a313aa43711db567
Publikováno v:
Annales Geophysicae, Vol 21, Pp 2073-2082 (2003)
The SuperDARN chain of oblique HF radars has provided an opportunity to generate a unique climatology of horizontal winds near the mesopause at a number of high latitude locations, via the Doppler shifted echoes from sources of ionisation in th
Externí odkaz:
https://doaj.org/article/de4a83e42fb04b0680960dcd25ad7e36
Publikováno v:
Annales Geophysicae, Vol 19, Pp 425-434 (2001)
The Doppler shifts of meteor echoes measured by the SuperDARN HF radar network have been used in several studies to observe neutral winds in the upper mesosphere and lower thermosphere region. In the absence of accurate height information for ind
Externí odkaz:
https://doaj.org/article/c0243e614d2f464a897734df808b6886
Autor:
D. M. Wright, J. A. Davies, T. R. Robinson, P. J. Chapman, T. K. Yeoman, E. C. Thomas, M. Lester, S. W. H. Cowley, A. J. Stocker, R. B. Horne, F. Honary
Publikováno v:
Annales Geophysicae, Vol 18, Pp 1248-1255 (2000)
SPEAR is a new polar cap HF radar facility which is to be deployed on Svalbard. The principal capabilities of SPEAR will include the generation of artificial plasma irregularities, operation as an 'all-sky' HF radar, the excitation of ULF waves, a
Externí odkaz:
https://doaj.org/article/39321788157a4364a0233dad982c6dc8
Publikováno v:
Annales Geophysicae, Vol 15, Pp 1548-1556 (1997)
A quantitative study of observations of the ionospheric signatures of magnetospheric ultra low frequency (ULF) waves by a high-latitude (geographic: 69.6°N 19.2°E) high-frequency Doppler sounder has been undertaken. The signatures, which are cle
Externí odkaz:
https://doaj.org/article/7c090dae5cf9489ea473dbb46a4d52a1
Publikováno v:
Hydrology and Earth System Sciences, Vol 1, Iss 3, Pp 671-685 (1997)
A combined hydrological and chemical investigation was undertaken in a small moorland catchment at Plynlimon to determine the processes controlling storm runoff chemistry. Flow from natural soil pipes, overland flow from peat soils, throughflow from
Externí odkaz:
https://doaj.org/article/8ab4b59ffb364b2b91b925edf93a5683
Autor:
Jacob B. J. Chapman, Pui-Wai Ma
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-15 (2022)
Abstract A machine-learned spin-lattice interatomic potential (MSLP) for magnetic iron is developed and applied to mesoscopic scale defects. It is achieved by augmenting a spin-lattice Hamiltonian with a neural network term trained to descriptors rep
Externí odkaz:
https://doaj.org/article/138e72874d904333bae14c2e0185724e