SISTEM MONITORING DAN ESTIMASI PASANG SURUT AIR LAUT PADA KANTOR PERHUBUNGAN LAUT KAB. MAJENE

Pasangsurut air lautmerupakansuatufenomenaalam yang biasaterjadisetiaphari.Fenomenapasangdansurutnyapermukaan air lautbiasadisebutpasanglaut (ocean tide).Pasangsurut (pasut) terjadidikarenakanolehperbedaangayagravitasidaripergantianposisibulandanmatahari yang relatifpadasatutitikdipermukaanbumi. Pasut di bumidapatdibagimenjaditigayaitu: pasutatmosfer (atmospheric tide), pasutlaut (ocean tide) danpasutbumipadat (bodily tide). Perkembanganteknologidan internet saatinisemakinpesatdanberusahauntukmenjawabsemuakebutuhanmanusia.Teknologi yang berkembangmengarahkepadasistem yangterhubungkejaringan internet yang dapatberdirisendiri, berdimensikecil, dankompak. Monitoring ketinggian air lautmerupakansuatuhubunganfungsional yang dibuatuntukmemudahkanmendapatkaninformasitransportasiperairan, di daerahMajene. Dalamproyekakhirinimengacudarihal di atas, sudahsepantasnyaalat monitoring danestimasiketinggian air lautsecaraotomatis yang terhubungkejaringan internet sudahdapatditerapkansebagaialatinformasiuntukmendapatkan data pasangsurut air lautsecara detail, untukmenunjangaktifitas di perairanKab. Majene.

Unlocking a Treasure Trove for Subsurface Characterization

Earth and atmospheric tide signatures embedded in groundwater levels are a potential game changer in the monitoring of confined aquifers.

NONLINEAR INTERACTION BETWEEN DIURNAL TIDAL AND 2-DAY WAVE IN THE METEOR WINDS OBSERVED AT CACHOEIRA PAULISTA-SP AND SÃO JOÃO DO CARIRI-PB, BRAZIL: A CASE STUDY

ABSTRACT. Simultaneous measurements of meteor winds obtained in S˜ao Jo˜ao do Cariri-PB and Cachoeira Paulista-SP, Brazil, during June-July 2008 were used to investigate the occurrence of nonlinear coupling between atmospheric wave modes. The wind spectrum showed the quasi simultaneous presence of spectral energy peaks in the periods near 16, 24 and 48 hours, consistent with the occurrence of interaction between 48-h and 24-h waves, and the generation of 16-h waves. From the bispectral analysis, it was possible to confirm the occurrence of a 16-hour secondary wave generated by non-linear coupling between the 2-day and diurnal tide primary waves.Keywords: atmospheric tide, bispectral analysis, meteor radar. RESUMO. Medidas simultâneas de ventos meteóricos obtidos em São João do Cariri-PB e Cachoeira Paulista-SP, Brasil, durante os meses de junho e julho de 2008, foram usadas para investigar a ocorrência de acoplamento não linear entre modos de ondas atmosféricas. Os espectros dos ventos evidenciaram a presença quase simultânea de picos de energia espectral nos períodos de ∼ 16, ∼ 24 e ∼ 48 horas, compatíveis com a ocorrência de interação entre as ondas de 48 e 24 horas, e a geraçao da onda de 16 horas. Através de análise biespectral foi possível confirmar que a onda secundária de 16 horas foi gerada pelo acoplamento não linear entre as ondas primárias de 2 dias e a maré diurna.Palavras-chave: maré atmosférica, análise biespectral, radar meteórico.