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摘要:
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| 基于ERA-Interim再分析資料,統(tǒng)計(jì)分析了南沙海域的風(fēng)場、海浪場的時(shí)空特征,并進(jìn)一步研究了風(fēng)浪成長關(guān)系,建立了適用于南沙海域的風(fēng)浪模型。月平均場分析結(jié)果表明:在季風(fēng)期,南沙海域的月平均有效波高與風(fēng)場的時(shí)空分布特征有良好的對應(yīng)關(guān)系,位于中南半島的東南部存在一個(gè)風(fēng)速和有效波高的大值中心,冬季強(qiáng)于夏季,中心位置隨季節(jié)轉(zhuǎn)換稍向下風(fēng)向移動(dòng)。頻率分析結(jié)果表明:南沙海域全年以4級(jí)以內(nèi)風(fēng)力和3級(jí)以內(nèi)海浪出現(xiàn)的頻率最高,6級(jí)以上大風(fēng)和5級(jí)以上海浪主要出現(xiàn)在冬季風(fēng)期間;全年最大風(fēng)速和浪高出現(xiàn)在10、11月,最大風(fēng)速達(dá)到8級(jí),最大有效波高可達(dá)6級(jí),但頻率非常小;整個(gè)海域風(fēng)速和浪高最小的時(shí)期是4-5月。 |
| Based on the ERA-Interim reanalysis data, the spatial and temporal characteristics of wind and wave fields in Nansha areas are statistically analyzed in this article. The wind-wave growth relation is further studied and a wind-wave model suitable for the Nansha areas is established. The analysis of spatial and temporal distribution shows a good correspondence between monthly mean significant wave height (Hs) and wind field in the monsoon period. In the southeast of Indo-China Peninsula, there is a high value center of both wind speed and Hs. The center is stronger in winter than that in summer, and the location moves slightly down the wind along with seasonal transition. The frequency analysis shows that wind below category 4 and wave under class 3 occur most frequently in the Nansha area. The wind force scale above category 6 and waves above class 5 mainly appear in winter. The maximum wind speed and wave height in the whole year appears in October and November with the maximum wind speed up to category 8 and the maximum Hs up to class 6, although the probability is extremely low. The minimum wind speed and wave height appears in April and May. |
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