【正文】 spring and summer whereas the same shoots were warmer during winter. Wholetree harvesting increased mean wind speeds measured at m by around 40% at each of the three sites during the first year after replanting. This effect diminished to 26, 20 and 5% over the following 3 years at the one site studied for the longest period, located in Kielder Forest, Northumberland. The biomass of 4yearold Sitka spruce trees was greater on wholetree harvested plots at two sites where growth was increased by fertiliser applications but was not affected by harvesting treatment at the more fertile third site in which no response to fertiliser was observed. (C) 2020 Elsevier Science . All rights reserved. Addresses: Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland。 Meteorology amp。 AngstromPrescott model。 IRRADIANCE Abstract: Performance of cloudbased (Kasten) and sunshinebased. (AngstromPrescott, Garg and Garg, Sivkov) empirical solar radiation models is presented for a lowland and mountain grassland sites. Data sets utilised for the study extended from 1991 to 1994. Adjustable parameters in the models were determined. Observed monthly mean values of solar radiation KJ and those estimated using Kasten model agreed within % for the lowland site and 13% for the mountain site, while those estimated using AngstromPrescott relation agreed with observation within % for lowland site and % for the mountain site. The incorporation of air mass, latitude and water vapour terms into AngstromPrescott relation did not significantly improve estimates of K down arrow. In general, AngstromPrescott as well as Garg and Garg models yielded the least RMSE for the study sites. (C) 2020 Elsevier Science . All rights reserved. Addresses: Univ Freiburg, Inst Meteorol, D79085 Freiburg, Germany Reprint Address: Iziomon, MG, Dalhousie Univ, Dept Phys, Atmospher Sci Program, Halifax, NS B3H 3J5, Canada. Cited References: *DIN VDI, 1999, HDB 2, V333. ANGSTROM A, 1924, QUART J ROY METEOROL, V50, P121. BADESCU V, 1997, SOL ENERGY, V61, P251. BARRY RG, 1992, MOUNTAIN WEAHTER CLI. CZEPLAK G, 1995, REKLIP KLIMA ATLAS O, P148. DOGNIAUX R, 1994, PREDICTION SOLAR RAD. GARG HP, 1982, SOLAR INDIA, P1004. HANSEN JW, 1999, AGR FOREST METEOROL, V94, P53. HUSSAIN M, 1984, SOL ENERGY, V33, P217. KAMEL MA, 1993, SOL ENERGY, V50, P463. KASTEN F, 1983, ANN MET, V20, P49. LIU DL, 2020, AGR FOREST METEOROL, V106, P41. MARISCAL MJ, 2020, AGR FOREST METEOROL, V100, P183. MAYER H, 2020, BER METEOR I U FREIB, V5, P55. MEZA F, 2020, AGR FOREST METEOROL, V100, P231. PRESCOTT JA, 1940, T ROY SOC SOUTH AUST, V64, P114. SIVKOV SI, 1964, T MAIN GEOPHYS OBS, V160. TAMM E, 1992, HDB HELIONDA PROGRAM. THORNTON PE, 1999, AGR FOREST METEOROL, V93, P211. WALLIS TWR, 1995, AGR FOREST METEOROL, V73, P115. WILKS DS, 1999, AGR FOREST METEOROL, V96, P85. Cited Reference Count: 21 Times Cited: 4 Publisher: ELSEVIER SCIENCE BV Publisher Address: PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS ISSN: 01681923 29char Source Abbrev.: AGR FOREST METEOROL ISO Source Abbrev.: Agric. For. Meteorol. Source Item Page Count: 11 Subject Category: Agronomy。 pressure drop。s equation. It is shown that paring different screens by plotting their pressure drop versus the upstream velocity may be misleading. Experiments in a roofventilated greenhouse with leeward roof openings revealed the obstruction offered by fine mesh screens to flow through the openings, and the resulting higher temperature and humidity within the greenhouse. (C) 2020 Published by Elsevier Science . 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