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Implication of land use change to biogeophysical and biogeochemical processes in Jambi, Indonesia: Analysed using CLM5 印度尼西亚占比土地利用变化对生物地球物理和生物地球化学过程的影响:基于CLM5的分析
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2020.12.17.01
U. Ma’rufah, T. June, A. Faqih, A. Ali, C. Stiegler, A. Knohl
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引用次数: 1
Characteristics and prediction of extreme drought event using LSTM model in Wei River Basin 基于LSTM模型的渭河流域极端干旱事件特征及预测
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.02.07.01
Dongfei Yan, R. Jiang, Jiancang Xie, Yong Zhao, Jiwei Zhu, Jichao Liang
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引用次数: 1
Coastal inundation modeling and mapping for North Jakarta coast during a supermoon period 超级月亮期间北雅加达海岸的海岸淹没模拟和制图
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.04.02.01
N. Riama, R. F. Sari, W. Sulistya, H. Rahmayanti, Khafid Rizki Pratama, B. E. Pratama, Arief Wibowo Suryo
Coastal areas are very vulnerable to disasters. One of the disasters that needs serious attention in coastal areas, including the coast of Jakarta, is coastal inundation. However, there is no integrated coastal inundation prediction system implemented in this area. This study aimed to build a model of coastal inundation by combining various factors, namely hydrodynamic model, wave model, and river model. The model used in this research is the integration of the Delft3D model, the WaveWatch III-SWAN model, and the SOBEK model. The results show that the simulation of the water level was in accordance with the observed data, from 30 November to 8 December 2017 during the supermoon period with a correlation accuracy of 0.9 and RMSE of 5.9 cm. However, the results of the simulation and astronomical tide prediction have a correlation of 0.81 and an RMSE is 13.6 cm. Therefore, it can be seen that the model is better than the astronomical tide prediction. The hydrodynamic model shows that Jakarta Bay has a water level range of 0.66 to 0.68 m during the supermoon period. The mapping of flood inundation areas show that the water level in the Tanjung Priok and Marunda in North Jakarta has a maximum inundation level of 50 to 100 cm with an inundation area of 272.17312 and 456.03653 m 2 . Meanwhile, our analysis for the Ancol and Kalibaru shows an inundation level of 0 to 30 cm with an inundation area of 388.04358 and 169.17656 m 2 . Our model provides better accuracy because it takes into account several important variables for modeling coastal inundation. Our early warning system proved to be accurate in providing coastal inundation prediction information for the North Jakarta area.
沿海地区很容易受到灾害的影响。包括雅加达海岸在内的沿海地区需要严重关注的灾害之一是沿海洪水。然而,该地区尚未建立综合的沿海洪水预报系统。本研究旨在结合水动力模型、波浪模型和河流模型,建立沿海淹没模型。本研究使用的模型是Delft3D模型、WaveWatch III-SWAN模型和SOBEK模型的集成。结果表明,2017年11月30日~ 12月8日超级月亮期间的水位模拟与观测数据基本一致,相关精度为0.9,RMSE为5.9 cm。模拟结果与天文潮汐预报的相关系数为0.81,均方根误差为13.6 cm。由此可见,该模型比天文潮汐预测效果更好。水动力模型表明,超级月亮期间雅加达湾的水位在0.66 ~ 0.68 m之间。洪水淹没区地图显示,雅加达北部丹戎不ok和玛伦达的最大淹没水位为50 ~ 100 cm,淹没面积分别为272.17312和456.03653 m2。Ancol和Kalibaru的淹没水位为0 ~ 30 cm,淹没面积分别为388.04358和169.17656 m2。我们的模型提供了更好的准确性,因为它考虑了几个重要的变量来模拟沿海淹没。事实证明,我们的预警系统在为雅加达北部地区提供沿海洪水预报信息方面是准确的。
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引用次数: 1
A new record of Podocarpaceae fossil wood from Miocene strata, Northern Taiwan 台湾北部中新世石竹科木化石新记录
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.07.28.02
Yuan-Po Lo, Jer‐Ming Hu
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引用次数: 1
Holocene fluvial landscape evolution driven by sea level and tectonic controls in the Gangkou River, Hengchun Peninsula 恒春半岛港口河全新世海平面和构造控制下的河流景观演化
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.04.08.01
Jia-hong Chen, S. Chyi, J. Yen, Lih-Der Ho, C. Lüthgens, Pei-Ling Wang, Li‐Hung Lin, I. Yen, C. Jen, J. Huang
The fluvial landscape of the Hengchun Peninsula in southernmost Taiwan is generally characterized by a narrow river and a wide valley plain. Such underfit stream features are unusual in tectonically active areas such as Taiwan. In this research, we hypothesize that the relative sea level change since the end of the last glacial period might be the main factor driving the formation of this type of landscape on the relatively recently emerged Taiwan Island. The Gangkou River is among the largest and most pristine rivers on the Hengchun Peninsula, and well-preserved river terraces and bedrock exposures occur along the river and river mouth. Therefore, the Gangkou River was thoroughly surveyed to investigate the factors shaping the landscape and to determine the landscape evolutionary history. Our research indicates that the average uplift rate of the Gangkou River is 1.5 - 1.7 mm yr -1 . Because of the low uplift rate, the rising sea level after the last glaciation caused widespread aggra-dation in the Gangkou River. At approximately 8.0 - 7.7 ka, maximum flooding oc-curred, and the sea level subsequently remained stable, while the aggradation stopped after 7.1 ka. Incision followed, forming the high terraces, and starting in the Little Ice Age, repeated aggradation and incision occurred, forming the low terraces. These processes produced the current landscape of the Gangkou River. Overall, the uplift rates calculated from this research are relatively low in this tectonically active area.
恒春半岛位于台湾最南端,其河流景观以窄河宽谷平原为主要特征。这种欠拟合的河流特征在台湾这样的构造活跃地区是不寻常的。在本研究中,我们假设末次冰期结束以来的相对海平面变化可能是在相对较晚出现的台湾岛上形成这种景观的主要因素。港口河是恒春半岛上最大、最原始的河流之一,沿河和河口有保存完好的河流梯田和基岩暴露。因此,本文对港口河进行了深入的调查,探讨了景观形成的因素,并确定了景观演化史。研究表明,港口河的平均抬升速率为1.5 ~ 1.7 mm /年。末次冰期后的海平面上升,由于抬升速率低,造成了港口河的大面积淤积。大约在8.0 ~ 7.7 ka发生了最大洪水,随后海平面保持稳定,而在7.1 ka后停止了沉积。随后是切割,形成高阶地;从小冰期开始,反复发生沉积和切割,形成低阶地。这些过程形成了现在的港口河景观。总体而言,本研究计算的隆升速率在该构造活动区相对较低。
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引用次数: 0
Joint modulations of Taiwan rainfall by tropical cyclone, northeast monsoon, and intraseasonal oscillation in October 热带气旋、东北季候风及季内涛动对台湾十月雨量的联合调制
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.09.06.01
T. Lai, Jau‐Ming Chen, C. Sui, M. Tsai, Ching-Feng Shih, Wei-Teh Li
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引用次数: 1
Determination of gravity anomalies in Java, Indonesia, from airborne gravity survey 印度尼西亚爪哇岛重力异常的航空重力测量测定
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.06.04.01
B. Bramanto, K. Prijatna, A. Pahlevi, ‪Dina Anggreni Sarsito, D. Dahrin, E. Variandy, Raa Ina Sidrotul Munthaha‬‬‬‬‬‬‬‬
The Geospatial Information Agency of Indonesia (BIG) recently carried out an airborne gravity survey mission to support a reliable Indonesian geoid model. The gravity observations covered all the main islands of Indonesia. This paper presents a state-of-the-art for gravity anomalies derivation using airborne gravity mission in Java, Indonesia. The common gravity corrections for deriving the scalar free-air gravity anomalies along the flight trajectory had been estimated using GNSS-derived positions. The corrected data were then filtered using the FIR method in which the cut-off frequency had been predetermined by considering aircraft altitude, geological setting, and instrument’s accuracy. To assess the airborne gravity results, we compared them with the upward continued terrestrial gravity measurements. In addition, we performed crossover analysis and adjusted the estimated biases to the airborne gravity measurements. The accuracy of adjusted airborne gravity anomaly was estimated to 3.37 mGal. In conclusion, the airborne gravity mission provided valuable data needed for further geodesy and geophysics applications
印度尼西亚地理空间信息机构(BIG)最近开展了一项空中重力测量任务,以支持可靠的印度尼西亚大地水准面模型。重力观测覆盖了印度尼西亚所有主要岛屿。本文介绍了利用印度尼西亚爪哇的机载重力任务进行重力异常推导的最新技术。利用gnss导出的位置估计了沿飞行轨迹导出标量自由空气重力异常的常见重力修正。然后使用FIR方法对校正后的数据进行滤波,其中截止频率是通过考虑飞机高度、地质环境和仪器精度而预先确定的。为了评估空中重力的结果,我们将它们与向上持续的地面重力测量结果进行了比较。此外,我们进行了交叉分析,并将估计偏差调整到航空重力测量值。校正后的航空重力异常精度估计为3.37 mGal。总之,机载重力任务为进一步的大地测量和地球物理应用提供了宝贵的数据
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引用次数: 0
COSMIC-2 radio occultation temperature, specific humidity, and precipitable water in Hurricane Dorian (2019) COSMIC-2无线电掩星温度、比湿度和飓风多里安(2019)中的可降水量
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.06.14.01
R. Anthes, J. Sjoberg, T. Rieckh, T. Wee, Z. Zeng
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引用次数: 2
Comprehensive validation of the FORMOSAT-7/COSMIC-2 electron density profiles and its application to space weather FORMOSAT-7/COSMIC-2电子密度曲线的综合验证及其在空间天气中的应用
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.12.30.03
I. Lee, Jyun-Ying Huang, Hsu-hui Ho, Wen-How Yeh, Mark Chia-Ping Cheng
Comprehensive Validation of the FORMOSAT-7/COSMIC-2 Electron Density Profiles and Its Application to Space Weather I-Te Lee, Jyun-Ying Huang, Hsu-Hui Ho, Wen-How Yeh, Mark Chia-Ping Cheng 1. Advanced Research Center for Earth Sciences, National Central University, Taoyuan City, Taiwan 2. Central Weather Bureau, Taipei City, Taiwan 3. Department of Space Science and Engineering, National Central University, Taoyuan City, Taiwan 4. Center for Atmospheric Resource and Disaster Studies, National Taiwan University, Taipei City, Taiwan 5. National Space Organization, National Applied Research Laboratories, Hsinchu County, Taiwan
formsat -7/COSMIC-2卫星电子密度曲线的综合验证及其在空间天气中的应用李泰,黄俊英,何徐辉,叶文豪,程家平1。2.国立中央大学地球科学高级研究中心,台湾桃园市;台湾台北市中央气象局国立中央大学空间科学与工程系,台湾桃园市国立台湾大学大气资源与灾害研究中心,台北市国家太空组织,国家应用研究实验室,台湾新竹县
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引用次数: 0
Post-collisional and volcanic features of the Late Miocene-Pleistocene foreland area, northern offshore Taiwan 台湾北部近海晚中新世-更新世前陆地区碰撞后火山特征
IF 0.8 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY Pub Date : 2021-01-01 DOI: 10.3319/tao.2021.12.30.04
H. Hsu, E. Y. Yang, Jih‐Hsin Chang, C. Su, Char‐Shine Liu, S. Chiu, Jen-Sen Shen
Based on multichannel seismic data northern offshore Taiwan, we revisited the post-collisional and volcanic features in the Late Miocene-Pleistocene wedge-top of the early Taiwan orogenic wedge. Seismic data transverse to wedge-top zone show the asymmetric and symmetric folds, along with blind thrusts and back thrusts. Seis-mic data parallel to the axis of the wedge-top zone show the volcanic features of poor stratified reflectors, forced fold and intrusive step of volcanic sills along and away from dominating normal fault structures. Since the volcanic extrusions and normal faults are probably associated events, we suggest that post-collisional extensional volcanism northern offshore Taiwan was probably formed along inherited primary and secondary fault structures. The wedge-top zone was formed at frontal part of the early Taiwan orogenic wedge in Late Miocene. Subsequent change of regional stress from convergence to extension led to the mountain collapse as well as primary and secondary normal faults. Thus, these post-collisional normal faults are mechanically weak, probably capable of providing pathways for the Pleistocene-present vol-canisms northern offshore Taiwan. The facilitation of post-collisional fault structures as transportation routes for deep material to migrate along may be important for the formation of the Quaternary volcanism extrusions northern offshore Taiwan.
根据台湾北部近海多道地震资料,重新研究了晚中新世-更新世台湾造山带楔顶的碰撞后和火山特征。沿楔顶带横向的地震资料显示出不对称和对称褶皱,并伴有盲逆冲和逆冲。平行于楔顶带轴线的地震资料显示出沿主导正断层构造和远离主导正断层构造的层状反射差、强迫褶皱和火山岩侵入阶的火山特征。由于火山喷发和正断层可能是相关事件,因此我们认为台湾北部近海碰撞后伸展火山活动可能是沿着继承的主、次断裂构造形成的。楔顶带形成于晚中新世早期台湾造山带前缘。随后区域应力由收敛到伸展的变化导致山体崩塌,并形成了主、次正断层。因此,这些碰撞后正断层的机械强度较弱,可能为台湾北部近海更新世至今的火山活动提供了通道。碰撞后的断裂构造为深部物质的迁移提供了便利通道,这可能对台湾北部近海第四纪火山作用挤压物的形成具有重要意义。
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Terrestrial, Atmospheric and Oceanic Sciences
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