Arctic Intermediate Water （AIW）, advected from the North Atlantic Ocean, has a potential influence on climate in the Arctic region, but is poorly simulated in coarse resolution models. In this study, a coupled ice-o...Arctic Intermediate Water （AIW）, advected from the North Atlantic Ocean, has a potential influence on climate in the Arctic region, but is poorly simulated in coarse resolution models. In this study, a coupled ice-ocean model is used to investigate features of AIW by conducting two sensitivity experiments based on Neptune parameterization and horizontal resolution. The re- suits show that both experiments improve the modeling of temperature profiles in the western Eurasian Basin, mainly as a result of more realistic volume and heat transport through the Fram Strait. Topographical flows are well reproduced using Neptune parame- terization or a finer horizontal resolution. In the eddy-permitting model with relatively higher resolution, the velocity field is more realistic than in the Neptune parameterization model, and complex inflow and outflow belts of barotropic structure are well repro- duced. The findings of this study suggest that increased model resolution, as provided by an eddy-resolving model, is needed to reproduce realistic circulation and thermohaline structure in the Arctic, since the Rossby radius of deformation is only several kilometers in the Arctic Ocean. This paper focuses on the external heat input rather than internal mixing process, and obtains a conclusion that the heat input from the Fram Strait is a main factor to reproduce AIW in the Eurasian Basin successfully, at least for the western part.展开更多
Detailed solar Angular Momentum (AM) graphs produced from the Jet Propulsion Laboratory (JPL) DE405 ephemeris display cyclic perturbations that show a very strong correlation with prior solar activity slowdowns. These...Detailed solar Angular Momentum (AM) graphs produced from the Jet Propulsion Laboratory (JPL) DE405 ephemeris display cyclic perturbations that show a very strong correlation with prior solar activity slowdowns. These same AM perturbations also occur simultaneously with known solar path changes about the Solar System Barycentre (SSB). The AM perturbations can be measured and quantified allowing analysis of past solar cycle modulations along with the 11,500 year solar proxy records (14C & 10Be). The detailed AM information also displays a recurring wave of modulation that aligns very closely with the observed sunspot record since 1650. The AM perturbation and modulation is a direct product of the outer gas giants (Uranus & Neptune). This information gives the opportunity to predict future grand minima along with normal solar cycle strength with some confidence. A proposed mechanical link between solar activity and planetary influence via a discrepancy found in solar/planet AM along with current AM perturbations indicate solar cycle 24 & 25 will be heavily reduced in sunspot activity resembling a similar pattern to solar cycles 5 & 6 during the Dalton Minimum (1790-1830).展开更多
The aim is to examine the creative queer spaces of Daniel Nolasco’s short films Uranus,Neptune,and Pluto.The main argument indicates that the trilogy unveils geographic landscapes that are not common to current imagi...The aim is to examine the creative queer spaces of Daniel Nolasco’s short films Uranus,Neptune,and Pluto.The main argument indicates that the trilogy unveils geographic landscapes that are not common to current imagination of a typical Brazilian heteronormative space,built by the contrast between the beaches and forests and the density of the city.In the three films,Nolasco explores the deviations from any heteronormative norm in creative queer spaces where alternative experiences and sensibilities of the male homoerotic body are possible.展开更多
Although people have studied comets for a long time and used spacecraft to detect comets in a short distance,the formation time and causes of comets are still unresolved.Therefore,according to the formation and evolut...Although people have studied comets for a long time and used spacecraft to detect comets in a short distance,the formation time and causes of comets are still unresolved.Therefore,according to the formation and evolution law of planets and the dynamic mechanism,the author thoroughly revealed the formation and evolution of comets:A powerful storm cyclone on Neptune,such as the Great Dark Spot,can involve a large number of clouds.These clouds are gradually cooled and compressed in the process of rapidly sinking along the spiral path,and then condense into huge water ice crystals at the bottom of the cyclone;When such a crystal falls into a deep hole filled with liquid hydrogen,it is easy to collide violently with the boulders in the hole,and instantly ignite the liquid hydrogen in the hole.Under the strong push of high-pressure gas,some fragments of the ice crystal can quickly reach a very high initial speed.Especially when the jet direction of the Great Dark Spot is consistent with the direction of Neptune’s revolution speed,such fragments can quickly reach Neptune’s escape speed of 23.56 km/s.Therefore,the fragments can break away from Neptune and enter an elliptical orbit around the sun,becoming a comet.Similarly,when the metal hydrogen at the bottom of a Great Red Spot on Jupiter explodes in a series,the fragments ejected from the Great Red Spot can reach the escape speed of Jupiter of 60 km/s,therefore,such fragments can break away from Jupiter and enter the elliptical orbit around the sun to become comets.Many of these comets can become asteroids in the asteroid belt,which is the formation principle of the asteroid belt.展开更多
Despite Pluto’s demotion to dwarf planet status,people are still attached to it.Scientists combined observations of Pluto from NASA’s New Horizons probe with observations of comet Churyumov-Gerasimenko from the Euro...Despite Pluto’s demotion to dwarf planet status,people are still attached to it.Scientists combined observations of Pluto from NASA’s New Horizons probe with observations of comet Churyumov-Gerasimenko from the European Space Agency’s Rosetta probe and found that Pluto’s nitrogen abundance matched the pattern of about a billion comets,which led to the theory that Pluto is made of about a billion comets.Yet they don’t know exactly when or where these comets originated.By studying the origin and orbit of comets,the author of this paper found that the material that condensed Pluto was mainly comets and dust ejected by Neptune,and the Kuiper Belt objects were condensed by material ejected by Neptune toward the outer side of its orbit.展开更多
基金supported by the "Plan 111"(Grant no.B07036)the National Natural Science Foundation of China (NNSFC) (Grant no.40631006)the International Cooperate Fund of NNSFC (Grant no.40810104046)
文摘Arctic Intermediate Water （AIW）, advected from the North Atlantic Ocean, has a potential influence on climate in the Arctic region, but is poorly simulated in coarse resolution models. In this study, a coupled ice-ocean model is used to investigate features of AIW by conducting two sensitivity experiments based on Neptune parameterization and horizontal resolution. The re- suits show that both experiments improve the modeling of temperature profiles in the western Eurasian Basin, mainly as a result of more realistic volume and heat transport through the Fram Strait. Topographical flows are well reproduced using Neptune parame- terization or a finer horizontal resolution. In the eddy-permitting model with relatively higher resolution, the velocity field is more realistic than in the Neptune parameterization model, and complex inflow and outflow belts of barotropic structure are well repro- duced. The findings of this study suggest that increased model resolution, as provided by an eddy-resolving model, is needed to reproduce realistic circulation and thermohaline structure in the Arctic, since the Rossby radius of deformation is only several kilometers in the Arctic Ocean. This paper focuses on the external heat input rather than internal mixing process, and obtains a conclusion that the heat input from the Fram Strait is a main factor to reproduce AIW in the Eurasian Basin successfully, at least for the western part.
文摘Detailed solar Angular Momentum (AM) graphs produced from the Jet Propulsion Laboratory (JPL) DE405 ephemeris display cyclic perturbations that show a very strong correlation with prior solar activity slowdowns. These same AM perturbations also occur simultaneously with known solar path changes about the Solar System Barycentre (SSB). The AM perturbations can be measured and quantified allowing analysis of past solar cycle modulations along with the 11,500 year solar proxy records (14C & 10Be). The detailed AM information also displays a recurring wave of modulation that aligns very closely with the observed sunspot record since 1650. The AM perturbation and modulation is a direct product of the outer gas giants (Uranus & Neptune). This information gives the opportunity to predict future grand minima along with normal solar cycle strength with some confidence. A proposed mechanical link between solar activity and planetary influence via a discrepancy found in solar/planet AM along with current AM perturbations indicate solar cycle 24 & 25 will be heavily reduced in sunspot activity resembling a similar pattern to solar cycles 5 & 6 during the Dalton Minimum (1790-1830).
文摘The aim is to examine the creative queer spaces of Daniel Nolasco’s short films Uranus,Neptune,and Pluto.The main argument indicates that the trilogy unveils geographic landscapes that are not common to current imagination of a typical Brazilian heteronormative space,built by the contrast between the beaches and forests and the density of the city.In the three films,Nolasco explores the deviations from any heteronormative norm in creative queer spaces where alternative experiences and sensibilities of the male homoerotic body are possible.
文摘Although people have studied comets for a long time and used spacecraft to detect comets in a short distance,the formation time and causes of comets are still unresolved.Therefore,according to the formation and evolution law of planets and the dynamic mechanism,the author thoroughly revealed the formation and evolution of comets:A powerful storm cyclone on Neptune,such as the Great Dark Spot,can involve a large number of clouds.These clouds are gradually cooled and compressed in the process of rapidly sinking along the spiral path,and then condense into huge water ice crystals at the bottom of the cyclone;When such a crystal falls into a deep hole filled with liquid hydrogen,it is easy to collide violently with the boulders in the hole,and instantly ignite the liquid hydrogen in the hole.Under the strong push of high-pressure gas,some fragments of the ice crystal can quickly reach a very high initial speed.Especially when the jet direction of the Great Dark Spot is consistent with the direction of Neptune’s revolution speed,such fragments can quickly reach Neptune’s escape speed of 23.56 km/s.Therefore,the fragments can break away from Neptune and enter an elliptical orbit around the sun,becoming a comet.Similarly,when the metal hydrogen at the bottom of a Great Red Spot on Jupiter explodes in a series,the fragments ejected from the Great Red Spot can reach the escape speed of Jupiter of 60 km/s,therefore,such fragments can break away from Jupiter and enter the elliptical orbit around the sun to become comets.Many of these comets can become asteroids in the asteroid belt,which is the formation principle of the asteroid belt.
文摘Despite Pluto’s demotion to dwarf planet status,people are still attached to it.Scientists combined observations of Pluto from NASA’s New Horizons probe with observations of comet Churyumov-Gerasimenko from the European Space Agency’s Rosetta probe and found that Pluto’s nitrogen abundance matched the pattern of about a billion comets,which led to the theory that Pluto is made of about a billion comets.Yet they don’t know exactly when or where these comets originated.By studying the origin and orbit of comets,the author of this paper found that the material that condensed Pluto was mainly comets and dust ejected by Neptune,and the Kuiper Belt objects were condensed by material ejected by Neptune toward the outer side of its orbit.
