CN108491597A - A kind of projectional technique of vertical deviation load tide and self-priming load tide - Google Patents
A kind of projectional technique of vertical deviation load tide and self-priming load tide Download PDFInfo
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- CN108491597A CN108491597A CN201810192627.XA CN201810192627A CN108491597A CN 108491597 A CN108491597 A CN 108491597A CN 201810192627 A CN201810192627 A CN 201810192627A CN 108491597 A CN108491597 A CN 108491597A
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Abstract
The invention discloses a kind of projectional techniques of vertical deviation load tide and self-priming load tide, using Green functional based methods, high-resolution CHINESE OFFSHORE region ocean tidal model and HAMTIDE12 global oceans tidal model and Gutenberg Bullen A earth models calculate load tide.It is as a result more accurate the beneficial effects of the invention are as follows the load tide projectional technique of gained is simple.
Description
Technical field
The invention belongs to oceanography technical fields, are related to a kind of reckoning side of vertical deviation load tide and self-priming load tide
Method.
Background technology
Under the action of oceanic tide load, relevant deformation, including displacement, inclination and strain occur for ground club；Simultaneously
It will produce gravitational field related with tide.The load effect of oceanic tide has in geodesic survey, geophysics and astronomy
It plays an important role, thus is paid close attention to by Geophysicist.Thalassographer is then primarily upon vertical deviation therein (also known as diameter
To displacement) and self-priming-load effect.The former is related to the accuracy that extraction oceanic tide information is observed by satellite altimeter；Afterwards
Person is related to the dynamics of oceanic tide and the accuracy of numerical simulation.So far there are no people to self-priming-load tide in sea
Effect in foreign tidal dynamics carried out research, and this research is significant for further recognizing the sea area tidal dynamics
's.
Invention content
It is of the invention the purpose of the present invention is to provide a kind of projectional technique of vertical deviation load tide and self-priming load tide
Advantageous effect is that the load tide projectional technique of gained is simple, as a result more accurate.
The technical solution adopted in the present invention is to measure to obtain tide composition referred to as the tidal surge of emotion of Sea level changes, ground tidal surge of emotion ζg
It is made of common oceanic tide ζ and solid earth tide；The latter is again by the directly caused body tide ζ of Between Celestial Tide-generating ForcesbThe sea and
Vertical displacement ζ caused by damp loadlTwo parts are formed, i.e.,
ζg=ζ+ζb+ζl (1)
Here various tidal heights are to be just, in order to obtain oceanic tide ζ from satellite altimeter data, it must be understood that body vertically upward
Damp ζbWith vertical displacement load tide ζl, ζbDirectly obtained by power to lead tide：
ζb=h2Φ/g (2)
Wherein Φ is tide generating potential；h2For Love numbers；G is acceleration of gravity；
On the other hand, oceanic tide also will produce self-priming effect, can change gravitational field together with load effect, so as to change
Become power to lead tide, the additional potential caused by self-priming and load is also indicated with corresponding balance tidal height, referred to as self-priming-load tide, is repaiied
Horizontal power to lead tide F after just is expressed as
Wherein ζ is oceanic tide height, ζEQTo consider the equilibrium tide tidal height after earth body tide：
ζEQ=(1+k2-h2)Φ/g (4)
Wherein k2For Love numbers；
Straight displacement load tide ζ is calculated using Green functional based methodslWith self-priming-load tide ζSAL, anyly according to this method
The ζ of pointlAnd ζSALIt can be calculated with following formula：
WhereinTo calculate the latitude and longitude of point,For the latitude and longitude of load point, ρwFor density of sea water,
A is earth radius, and integral carries out global ocean S, GlAnd GSALFor corresponding Green functions, θ isWithBetween
Angular distance, be given by：
Green functions are then decided by loading Love numbers h' in formula (5) and (6)nAnd k'n:
Wherein MeFor earth quality, Pn(cos θ) is n-th order Legendre multinomials, loading Love numbers h'nWith combination load
Love numbers (1+k'n-h'n) depend on used earth model.
Further, the loading Love numbers and Green are given using Gutenberg-BullenA (G-B) earth model
Function.
Specific implementation mode
The present invention is described in detail With reference to embodiment.
Since satellite altimeter can obtain the sea level height data in the quasi- whole world, tide research is had been widely used for.But it defends
Elevation meter can only measure sea to the distance of earth center, therefore measure and obtain tide composition referred to as the tidal surge of emotion of Sea level changes.
Ground tidal surge of emotion ζgIt is made of common oceanic tide ζ and solid earth tide；The latter is again by the directly caused body of Between Celestial Tide-generating Forces
Damp ζbWith vertical displacement ζ caused by oceanic tides loadinglTwo parts are formed, i.e.,
ζg=ζ+ζb+ζl (1)
Here various tidal heights are to be just vertically upward.Vertical displacement load tide is also referred to as radial displacement load tide.In order to from satellite
Altimeter data obtains oceanic tide ζ, it must be understood that body tide ζbWith vertical displacement load tide ζl。ζbIt can directly be obtained by power to lead tide：
ζb=h2Φ/g (2)
Wherein Φ is tide generating potential；h2For Love numbers；G is acceleration of gravity.
On the other hand, oceanic tide also will produce self-priming effect, can change gravitational field together with load effect, so as to change
Become power to lead tide.Therefore tidal dynamics research is being carried out, it is also contemplated that this effect, i.e., so-called especially in tide numerical simulation
Self-priming-load (self-attraction andload, be abbreviated as SAL) effect.Similar with tide generating potential, self-priming and load are drawn
The additional potential risen generally also indicates with corresponding balance tidal height, and referred to as self-priming-balancing the load is damp or abbreviation self-priming-load
Tide.In this way, revised horizontal power to lead tide F can be expressed as
Wherein ζ is oceanic tide height, ζEQTo consider the equilibrium tide tidal height after earth body tide：
ζEQ=(1+k2-h2)Φ/g (4)
Wherein k2For Love numbers.
The present invention using Green functional based methods (Farrell, 1972；Francis andMazzega, 1990) calculate straight position
Move load tide ζlWith self-priming-load tide ζSAL.According to the ζ in any place of this methodlAnd ζSALIt can be calculated with following formula：
WhereinTo calculate the latitude and longitude of point,For the latitude and longitude of load point, ρwFor density of sea water,
A is earth radius, and integral carries out global ocean S, GlAnd GSALFor corresponding Green functions, θ isWithBetween
Angular distance (great circle arc angle), be given by：
Green functions are then decided by loading Love numbers h' in formula (5) and (6)nAnd k'n:
Wherein MeFor earth quality, Pn(cos θ) is n-th order Legendre multinomials.Loading Love numbers h'nWith combination load
Love numbers (1+k'n-h'n) depend on used earth model.It is given using Gutenberg-BullenA (G-B) earth model
Loading Love numbers and Green functions are gone out.
The method of the present invention and resultful comparison：
The displacement load tide and the method for the present invention result of calculation on the ground such as existing China's Mainland, TaiWan, China, Hong Kong carry out
Compare.Table 1 lists the result that above each research is calculated with this research.M is listed in table2And K1Partial tide result is respectively as semi-diurnal tides
With the representative of full-time tide；Containing using G-B earth models as a result, only listed in table wherein use the model result.Using
The delay angle of universal time, i.e. Greenwich delay angle.
1 research of table calculates gained vertical deviation load tide and resultful comparison
By table 1, it can be seen that, result of calculation of the present invention has good consistency, especially M with existing result2Amplitude
And K1Amplitude and delay angle difference all very littles.Most of place M2The difference of delay angle is also little, and difference maximum value appears in Zhou
Deng[6]The Urumchi result of calculating.Its reason is that Urumchi is placed exactly in M2The no-tide point of vertical deviation load tide is attached
Closely, amplitude very little, phase change are big.In Taiwan west bank, this may be by existing data institute in another difference big region
The Taiwan Straits tide data is not accurate enough.
The present invention uses Green functional based methods, high-resolution CHINESE OFFSHORE region ocean tidal model and the whole world HAMTIDE12
Oceanic tide model and Gutenberg-BullenA earth models calculate load tide.The result shows that Bohai Huanghai East China Sea M2
For vertical deviation load tide amplitude maximum present in the about 150km of Zhejiang off-lying sea, value is more than 28mm；Second largest value is located at Jinsen
Gulf, more than 20mm；The third-largest value is located at northern Huanghai Sea northeast, more than 14mm.S2Vertical deviation load tide shaking at above-mentioned three
Amplitude is respectively more than 10,8 and 4mm.K1And O1Vertical deviation load tide amplitude is maximum, difference near the Ryukyu Islands central and north
More than 13 and 10mm；It is gradually reduced to inland sea.Semidiurnal constituent vertical deviation load tide partial tide tool substantially corresponding with oceanic tide
There is opposite position phase.It is basic in the big portion in the East Sea and Sedimentation rates whole medicine vertical deviation load tide and corresponding tide partial tide
The upper relationship with out-of phase, and do not have antiposition phase relation substantially in remaining marine site of Bohai Sea and Yellow Sea.In research sea area, entirely
There is not no-tide point in the vertical deviation load tide of diurnal tide.Self-priming-balancing the load tide distribution characteristics and vertical deviation load tidal epoch
Closely, amplitude is about 1.2-1.7 times of vertical deviation load tide, and phase and vertical deviation load tide are essentially the inverse.M2
Peak swing value also appears in Zhejiang off-lying sea, more than 42mm.
The above is only the better embodiment to the present invention, not makees limit in any form to the present invention
System, every any simple modification that embodiment of above is made according to the technical essence of the invention, equivalent variations and modification,
Belong in the range of technical solution of the present invention.
Claims (2)
1. a kind of projectional technique of vertical deviation load tide and self-priming load tide, it is characterised in that：
Measurement obtains tide composition referred to as the tidal surge of emotion of Sea level changes, ground tidal surge of emotion ζgBy common oceanic tide ζ and solid earth tide
Nighttide is formed；The latter is again by the directly caused body tide ζ of Between Celestial Tide-generating ForcesbWith vertical displacement ζ caused by oceanic tides loadinglTwo parts institute
Composition, i.e.,
ζg=ζ+ζb+ζl (1)
Here various tidal heights are to be just, in order to obtain oceanic tide ζ from satellite altimeter data, it must be understood that body vertically upward
Damp ζbWith vertical displacement load tide ζl, ζbDirectly obtained by power to lead tide：
ζb=h2Φ/g (2)
Wherein Φ is tide generating potential；h2For Love numbers；G is acceleration of gravity；
On the other hand, oceanic tide also will produce self-priming effect, can change gravitational field together with load effect, draw so as to change
Additional potential caused by power from ocean tides, self-priming and load also indicates with corresponding balance tidal height, referred to as self-priming-load tide, after amendment
Horizontal power to lead tide F be expressed as
F=-g ▽ (ζ-ζEQ-ζSAL) (3)
Wherein ζ is oceanic tide height, ζEQTo consider the equilibrium tide tidal height after earth body tide：
ζEQ=(1+k2-h2)Φ/g (4)
Wherein k2For Love numbers；
Straight displacement load tide ζ is calculated using Green functional based methodslWith self-priming-load tide ζSAL, according to any place of this method
ζlAnd ζSALIt can be calculated with following formula：
WhereinTo calculate the latitude and longitude of point,For the latitude and longitude of load point, ρwFor density of sea water, a is
Earth radius, integral carry out global ocean S, GlAnd GSALFor corresponding Green functions, θ isWithBetween
Angular distance is given by：
Green functions are then decided by loading Love numbers h' in formula (5) and (6)nAnd k'n:
Wherein MeFor earth quality, Pn(cos θ) is n-th order Legendre multinomials, loading Love numbers h'nWith combination load Love
Number (1+k'n-h'n) depend on used earth model.
2. according to a kind of projectional technique of vertical deviation load tide and self-priming load tide described in claim 1, it is characterised in that：It adopts
The loading Love numbers and Green functions are given with Gutenberg-Bullen A (G-B) earth model.
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| CN201810192627.XA CN108491597A (en) | 2018-03-09 | 2018-03-09 | A kind of projectional technique of vertical deviation load tide and self-priming load tide |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917382A (en) * | 2019-03-19 | 2019-06-21 | 中国海洋大学 | The assessment of oceanic tides loading Influence of Displacement and bearing calibration in littoral zone InSAR interference pattern |
| CN113761808A (en) * | 2021-11-08 | 2021-12-07 | 长沙理工大学 | Earth surface tide displacement acquisition method based on GPS and empirical tide model, and application method and system thereof |
| CN114444330A (en) * | 2022-04-02 | 2022-05-06 | 自然资源部第一海洋研究所 | GNSS sea tide load displacement prediction method considering average effect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154348A (en) * | 2016-06-28 | 2016-11-23 | 国家***第海洋研究所 | A kind of ocean, air and the projectional technique of fresh water load effect and system |
-
2018
- 2018-03-09 CN CN201810192627.XA patent/CN108491597A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154348A (en) * | 2016-06-28 | 2016-11-23 | 国家***第海洋研究所 | A kind of ocean, air and the projectional technique of fresh water load effect and system |
Non-Patent Citations (1)
| Title |
|---|
| 方国洪等: "渤、黄、东海垂向位移负荷潮和自吸-负荷潮", 《中国科学：地球科学》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917382A (en) * | 2019-03-19 | 2019-06-21 | 中国海洋大学 | The assessment of oceanic tides loading Influence of Displacement and bearing calibration in littoral zone InSAR interference pattern |
| CN113761808A (en) * | 2021-11-08 | 2021-12-07 | 长沙理工大学 | Earth surface tide displacement acquisition method based on GPS and empirical tide model, and application method and system thereof |
| CN113761808B (en) * | 2021-11-08 | 2022-02-11 | 长沙理工大学 | Surface tide displacement acquisition method and application method and system |
| CN114444330A (en) * | 2022-04-02 | 2022-05-06 | 自然资源部第一海洋研究所 | GNSS sea tide load displacement prediction method considering average effect |
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Address after: 266000 Shandong Qingdao hi tech Industrial Park, Xian Xia Ling Road. Applicant after: FIRST INSTITUTE OF OCEANOGRAPHY, MNR Applicant after: QINGDAO NATIONAL LABORATORY FOR MARINE SCIENCE AND TECHNOLOGY DEVELOPMENT CENTER Address before: Laoshan District xianxialing road 266061 Shandong city of Qingdao province No. 6 Applicant before: THE FIRST INSTITUTE OF OCEANOGRAPHY, SOA Applicant before: QINGDAO NATIONAL LABORATORY FOR MARINE SCIENCE AND TECHNOLOGY DEVELOPMENT CENTER |
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