SEASONAL CHANGES IN TITAN'S SURFACE TEMPERATURES
SEASONAL CHANGES IN TITAN'S SURFACE TEMPERATURES
复制标题
泰坦表面温度的季节性变化
DOI：
10.1088/2041-8205/737/1/l15
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Tokano
中科院分区：
文献类型：
--
作者：
D. Jennings;V. Cottini;C. Nixon;F. Flasar;V. Kunde;R. Samuelson;P. Romani;B. Hesman;R. Carlson;N. Gorius;A. Coustenis;T. Tokano
土卫六表面亮度温度的季节性变化已经被卡西尼号在热红外线中观测到。复合红外光谱仪在两个时间段测量了19 μm的地表辐射：一个是在北方冬末（LNW; Ls = 335°），另一个是在北方春分（NSE; Ls = 0°）。在这两个时期，我们构建了极地到极地地图的纬向平均亮度温度校正大气的影响。LNW和NSE之间的温度分布发生了变化，其特点是在北部变暖10.5 K，在南部冷却约相同的金额。在春分点，极地表面温度都接近91 K，赤道为93.4 K。我们测量到赤道表面温度分布的季节滞后ΔLS = 1.9 °，与旅行者1号的后春分结果以及大气环流模型的预测一致。在南纬65°处，在中纬度和南部云区之间相对无云的地带，观察到温度略有升高。
Seasonal changes in Titan's surface brightness temperatures have been observed by Cassini in the thermal infrared. The Composite Infrared Spectrometer measured surface radiances at 19 μm in two time periods: one in late northern winter (LNW; Ls = 335°) and another centered on northern spring equinox (NSE; Ls = 0°). In both periods we constructed pole-to-pole maps of zonally averaged brightness temperatures corrected for effects of the atmosphere. Between LNW and NSE a shift occurred in the temperature distribution, characterized by a warming of ∼0.5 K in the north and a cooling by about the same amount in the south. At equinox the polar surface temperatures were both near 91 K and the equator was at 93.4 K. We measured a seasonal lag of ΔLS ∼ 9° in the meridional surface temperature distribution, consistent with the post-equinox results of Voyager 1 as well as with predictions from general circulation modeling. A slightly elevated temperature is observed at 65° S in the relatively cloud-free zone between the mid-latitude and southern cloud regions.
影响因子：
3.2
作者：
de Kok, R.;Irwin, P. G. J.;Taylor, F. W.
通讯作者：
Taylor, F. W.