1.27 μm波段的氧分子近红外气辉是火星大气最重要的气辉辐射之一, 该气辉高光谱分辨辐射传输模型的建立对于研制火星探测载荷, 反演火星大气的风场温度场与臭氧浓度, 以及研究火星空间物理, 有重要的科学价值与工程意义.在研究火星大气O2(a1Δg)气辉光化学反应模型的基础上, 提出了O2(a1Δg)气辉体辐射率的计算方法, 并建立了火星大气气辉辐射传输理论; 通过与用于研究火星大气特征的光谱学探测仪(Spectroscopy Spectrograph for the Investigation of Characteristics of the Atmosphere of Mars, SPICAM)的实测数据进行对比, 验证了所建立的火星O2(a1Δg)气辉高光谱分辨辐射传输模型的准确性; 针对火星与地球大气的O2(a1Δg)气辉, 在体辐射率、自吸收效应, 以及临边辐射光谱特性三个方面进行了系统深入的比较, 对比结果表明, 火星大气由于密度低、氧气丰度小, 其自吸收效应可以忽略不计, 但其O2(a1Δg)气辉辐射强度与地球大气相当, 可以用于火星大气的风场温度场与臭氧浓度的探测与反演.
This study examined the effect of different salinities(0, 5, 10, 15, 20, 25 and 30) on the growth performance and energy budget of juveniles of two different ecotypes of Oncorhynchus mykiss, landlocked rainbow trout and anadromous steelhead trout. In the 42 d experiment, fish were cultured in three replicate tanks per salinity treatment(eight fish per tank). At the end of the experiment, the growth of rainbow and steelhead trouts was significantly higher at salinities of 5 and 10, respectively, than at all other salinities. The protein, lipid and energy content of both ecotypes declined with the increase of salinity. Based on their energy budgets, the percentage of energy consumed for growth by rainbow and steelhead trouts were significantly higher at salinities of 5(34.00% ±1.69%) and 10(43.76% ± 1.29%), respectively, than at all other salinities. The percentage of energy consumed for respiration by rainbow and steelhead trouts was lower at salinities of 5(54.90% ± 1.77%) and 10(46.73% ± 0.62%), respectively, than at all other salinities. Our results indicated that the salinity adaptation ability of juvenile steelhead trout was slightly better than that of juvenile rainbow trout, and salinities of 10 and 5, respectively, were most suitable for growth of these two fishes. 相似文献