Most Changes In The Earth’s_文教Education
most changes in the earth’s shape are tied to climate swings
研究发现: 地球形状发生变化与气象有关
researchers at the university of texas at austin have found that significant changes in the shape of the earth in the past 28 years may be linked to climate events such as the el nino weather pattern.
researchers at the university of texas at austin have found that significant changes in the shape of the earth in the past 28 years may be linked to climate events such as the el nino weather pattern.
the earth’s shape changes because the climate events shift where the mass of water is stored: in oceans, continents and the atmosphere.
dr. minkang cheng and dr. byron d. tapley of the university’s center for space research used nearly 30 years of nasa satellite laser ranging (slr) data to examine how much the earth flattens at the poles and widens at the equator.
cheng, a research scientist, and tapley, the director of the center, looked at events like el nino-southern oscillation and pacific decadal oscillation that affect the amount of water moving in the oceans, atmosphere and continents around the world.
the scientists found that two large variations of increases in the earth bulging at the equator were connected to the strong el nino-southern oscillation events from 1986-1991 and 1996-2002.
although el nino is normally associated with warming of surface waters in the eastern pacific ocean, it also causes changes in weather patterns and the way the ocean circulates.
during an el nino, heavy rains associated with the warmer waters move into the central pacific ocean and typically cause drought in australia, and floods in peru. that is, there’s more water in peru, less water in australia.
similar to el nino, but lasting 20 to 30 years instead of months, the pacific decadal oscillation is a long-term temperature fluctuation in the pacific ocean. the oscillation also brings changes in the location of the cold and warm water masses that also alter the path of the jet stream, which moves storms around the world.
these changes redistribute water mass among the oceans, and water vapor in the atmosphere, and in soil on the continents, resulting in slight but detectable changes of the earth’s gravity field.
cheng and tapley found that the variations in mass, which caused the change in the gravity field, were predominantly over the continents, with a smaller contribution due to changes over the ocean.
美国得克萨斯大学的家经研究发现，在过去28年中，地球形状发生明显的变化似乎都与气象事件（如厄尔尼诺现象等）有关系。
据美国《每日》杂志网站1月10日报道，得克萨斯大学空间研究中心的康·程博士和拜伦d·塔普利博士利用美国航天局大约30年的人造卫星激光测距数据，分析地球两极变平坦，赤道地区增宽的程度。在研究过程中，他们发现一些气候现象如厄尔尼诺-南方震荡现象 (el nino -southern oscillation)和太平洋10年振荡现象(pacific decadal oscillation)等会影响到世界上流入海洋、大陆和进入大气的水量的大小。
研究者发现，地球赤道凸起的两次大变化与1986年至1991年以及1996年至今年的两次强厄尔尼诺-南方震荡现象有关。
尽管厄尔尼诺现象通常会被与东太平洋海面温度增高联系在一起，但同时它还会引起气象模式和海洋流动的方式发生变化。厄尔尼诺现象来临时，信风减弱，暖水东移，给东太平洋地区带来大量降雨，同时使秘鲁等国家陷于洪涝，印度尼西亚和澳大利亚则苦于干旱。与厄尔尼诺现象相比，太平洋10年振荡现象则会持续20年至30年的时间。
太平洋10年振荡现象是太平洋一个长期的温度波动现象。它同样会影响到冷、暖水团的分布，同时也会使喷射气流的路线发生改变。而这些变化则会使海洋中的水团，大气中的水汽和陆地土壤中的水重新分布，从而可以引起地球重力场发生轻微的，但是可以察觉的变化。
程博士和塔普利博士同时还发现，这些引起地球重力场发生变化的因素，主要来自于陆地，只有一小部分来自于海洋的变化。
报道说，这一研究结果还被发表在地球学研究期刊——《固体地球》上。
研究发现: 地球形状发生变化与气象有关
researchers at the university of texas at austin have found that significant changes in the shape of the earth in the past 28 years may be linked to climate events such as the el nino weather pattern.
researchers at the university of texas at austin have found that significant changes in the shape of the earth in the past 28 years may be linked to climate events such as the el nino weather pattern.
the earth’s shape changes because the climate events shift where the mass of water is stored: in oceans, continents and the atmosphere.
dr. minkang cheng and dr. byron d. tapley of the university’s center for space research used nearly 30 years of nasa satellite laser ranging (slr) data to examine how much the earth flattens at the poles and widens at the equator.
cheng, a research scientist, and tapley, the director of the center, looked at events like el nino-southern oscillation and pacific decadal oscillation that affect the amount of water moving in the oceans, atmosphere and continents around the world.
the scientists found that two large variations of increases in the earth bulging at the equator were connected to the strong el nino-southern oscillation events from 1986-1991 and 1996-2002.
although el nino is normally associated with warming of surface waters in the eastern pacific ocean, it also causes changes in weather patterns and the way the ocean circulates.
during an el nino, heavy rains associated with the warmer waters move into the central pacific ocean and typically cause drought in australia, and floods in peru. that is, there’s more water in peru, less water in australia.
similar to el nino, but lasting 20 to 30 years instead of months, the pacific decadal oscillation is a long-term temperature fluctuation in the pacific ocean. the oscillation also brings changes in the location of the cold and warm water masses that also alter the path of the jet stream, which moves storms around the world.
these changes redistribute water mass among the oceans, and water vapor in the atmosphere, and in soil on the continents, resulting in slight but detectable changes of the earth’s gravity field.
cheng and tapley found that the variations in mass, which caused the change in the gravity field, were predominantly over the continents, with a smaller contribution due to changes over the ocean.
美国得克萨斯大学的家经研究发现，在过去28年中，地球形状发生明显的变化似乎都与气象事件（如厄尔尼诺现象等）有关系。
据美国《每日》杂志网站1月10日报道，得克萨斯大学空间研究中心的康·程博士和拜伦d·塔普利博士利用美国航天局大约30年的人造卫星激光测距数据，分析地球两极变平坦，赤道地区增宽的程度。在研究过程中，他们发现一些气候现象如厄尔尼诺-南方震荡现象 (el nino -southern oscillation)和太平洋10年振荡现象(pacific decadal oscillation)等会影响到世界上流入海洋、大陆和进入大气的水量的大小。
研究者发现，地球赤道凸起的两次大变化与1986年至1991年以及1996年至今年的两次强厄尔尼诺-南方震荡现象有关。
尽管厄尔尼诺现象通常会被与东太平洋海面温度增高联系在一起，但同时它还会引起气象模式和海洋流动的方式发生变化。厄尔尼诺现象来临时，信风减弱，暖水东移，给东太平洋地区带来大量降雨，同时使秘鲁等国家陷于洪涝，印度尼西亚和澳大利亚则苦于干旱。与厄尔尼诺现象相比，太平洋10年振荡现象则会持续20年至30年的时间。
太平洋10年振荡现象是太平洋一个长期的温度波动现象。它同样会影响到冷、暖水团的分布，同时也会使喷射气流的路线发生改变。而这些变化则会使海洋中的水团，大气中的水汽和陆地土壤中的水重新分布，从而可以引起地球重力场发生轻微的，但是可以察觉的变化。
程博士和塔普利博士同时还发现，这些引起地球重力场发生变化的因素，主要来自于陆地，只有一小部分来自于海洋的变化。
报道说，这一研究结果还被发表在地球学研究期刊——《固体地球》上。